2024-03-29T05:57:51Z
https://journals.urfu.ru/index.php/index/oai
oai:journals.urfu.ru:article/5874
2022-06-22T10:04:57Z
chimtech:A
nmb a2200000Iu 4500
"220614 2022 eng "
2411-1414
dc
Synthesis of 5<i>H</i>-Chromeno[4,3-<i>b</i>]pyridin-5-one derivatives as a backbone of natural product polyneomarline C scaffolds in presence of Et<sub>3</sub>N and NH<sub>4</sub>OAc in EtOH
Kundu, Shrishnu Kumar
Acharya Prafulla Chandra Roy Government College
Patra, Susanta
Jhargram Raj College
Sardar, Chayan
Techno-India University
Bhanja, Sunil Kumar
Government General Degree College
Patra, Prasanta
Jhargram Raj College
5H-Chromeno[4,3-b]pyridin-5-one; green synthesis; 4-chloro-3-formyl coumarin; active methylene group; Polyalthia nemoralis C
A green one-pot synthesis of 5H-Chromeno[4,3-b]pyridin-5-one derivatives which are the main core of the natural product of Polyneomarline C is described by the reaction of 4-chloro-3-formyl coumarin and different cyclic and acyclic compounds having active methylene group in presence of Et3N and NH4OAc in EtOH. The advantages of this strategy are good yields, no need for the chromatographic separation and the absence of heavy metal catalysts and toxic by-products. The 4-chloro-3-formyl coumarin is obtained by Vilsmeier Heck reaction of 4-hydroxy coumarin.
Ural Federal University
2022-06-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5874
Chimica Techno Acta; Том 9, № 2 (2022)
eng
(c) 2022 Shrishnu Kumar Kundu, Susanta Patra, Chayan Sardar, Sunil Kumar Bhanja, Prasanta Patra
oai:journals.urfu.ru:article/1094
2022-12-15T15:10:46Z
chimtech:A
nmb a2200000Iu 4500
"150329 2015 eng "
2411-1414
dc
Modeling of a microstructure and calculation of a tortuosity factor for cathodic materials of LSM–YSZ
Farlenkov, A. S.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Anan’ev, M. V.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
composite material; speed of interfacial oxygen exchange; tortuosity factor
В работе на примере композиционного материала LSM—YSZ сравнивается изменение физико-химических свойств (скорости межфазного обмена кислорода и удельного сопротивления) и параметров микроструктуры (протяженности ТФГ и фактора извилистости) от времени с целью нахождения количественных взаимосвязей. Для электродных материалов LSM—YSZ проведена 3D-реконструкция микроструктуры и рассчитан фактор извилистости на основе результата анализа изображений РЭМ с использованием оригинального программного обеспечения.
Ural Federal University
2015-03-29 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1094
Chimica Techno Acta; Том 2, № 1 (2015)
rus
(c) 2015 A. S. Farlenkov, M. V. Anan’ev
oai:journals.urfu.ru:article/2045
2022-12-15T15:09:13Z
chimtech:A
nmb a2200000Iu 4500
"161230 2016 eng "
2411-1414
dc
The production of novolac oligomers
Galushchinsky, A. N.
Y-Synthes Ltd., Ekaterinburg
Obydennov, K. L.
Y-Synthes Ltd., Ekaterinburg
phenol; formalin; oxalic acid; novolac; oligomer; the polycondensation reaction; material cal-culations; production technology; instrumental scheme
В работе представлено усовершенствование технологии производства новолачных фенолоформальдегидных олигомеров путем введения новой схемы улавливания отходящих газов за счет отходов производства, что приводит к сокращению расходов и увеличению экономической эффективности. Выполнен расчет материального баланса производства новолачного фенолоформальдегидного олигомера на 300 кг/ч технического продукта, произведен технологический расчет основного и выбор вспомогательного оборудования. Составлена аппаратурная схема производства, а также представлено описание технологического процесса. Выполнен чертеж основного реактора.
Ural Federal University
2016-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2045
Chimica Techno Acta; Том 3, № 4 (2016)
rus
(c) 2016 A. N. Galushchinsky, K. L. Obydennov
oai:journals.urfu.ru:article/1719
2022-12-15T15:10:18Z
chimtech:A
nmb a2200000Iu 4500
"160315 2016 eng "
2411-1414
dc
Surface reactions with participation of oxides of molybdenum and tungsten: the influence of external factors
Guseva, A. F.
Ural federal university, Ekaterinburg
Trifonova, M. V.
Ural federal university, Ekaterinburg
Pestereva, N. N.
Ural federal university, Ekaterinburg
mass transfer; reaction surface diffusion; surface reactions; molybdates; tungstates
Данная работа является продолжением статьи «Поверхностные реакции с участием оксидов молибдена и вольфрама», опубликованной в предыдущем номере журнала. Исследовано влияние электрического поля и давления кислорода в газовой фазе на скорость поверхностных реакций синтеза молибдатов марганца и меди. Установлено, что для реакции синтеза молибдата меди характер зависимостей скорости синтеза и скорости поверхностной реакции от внешних параметров одинаков, что свидетельствует об определяющем вкладе поверхностной диффузии в реакционный массоперенос. Для реакции синтеза молибдата марганца зависимости скорости синтеза и скорости поверхностной реакции от внешних параметров отличаются, что свидетельствует о том, что для этой реакции поверхностная диффузия не является основным механизмом массопереноса.
Ural Federal University
2016-03-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1719
Chimica Techno Acta; Том 3, № 1 (2016)
rus
(c) 2016 A. F. Guseva, M. V. Trifonova, N. N. Pestereva
oai:journals.urfu.ru:article/2248
2022-12-15T15:22:51Z
chimtech:R
nmb a2200000Iu 4500
"170530 2017 eng "
2411-1414
dc
Nucleophilic conjugate trifluoromethylation of chromones and activated alkenes under the action of Ruppert’s reagent
Sosnovskikh, V. Ya.
Ural Federal University, Ekaterinburg
Roshentaler, G.-V.
Jacobs University Bremen
chromones; activated alkenes; nucleophilic 1,4-trifluoromethylation; trimethyl(trifluoromethyl)silane
В обзоре обобщены данные по реакциям хромонов и активированных алкенов с триметил(трифторметил)силаном (реагент Рупперта), которые протекают как нуклеофильное 1,4-трифторметилирование с высокой региоселективностью и хорошими выходами. Важнейшие химические свойства образующихся при этом продуктов также рассмотрены.
Ural Federal University
2017-04-14 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2248
Chimica Techno Acta; Том 4, № 1 (2017)
rus
(c) 2017 V. Ya. Sosnovskikh, G.-V. Roshentaler
oai:journals.urfu.ru:article/5120
2021-12-28T02:27:04Z
chimtech:A
nmb a2200000Iu 4500
"211211 2021 eng "
2411-1414
dc
Silica gel functionalized with imidazolium group via click chemistry – new stationary phase for ion chromatography
Chuprynina, D. A.
Kuban State University, Department of Chemistry and High Technologies, Krasnodar
Lupanova, I. A.
Kuban State University, Department of Chemistry and High Technologies, Krasnodar
Konshin, V. V.
Kuban State University, Department of Chemistry and High Technologies, Krasnodar https://orcid.org/0000-0003-1864-531X
Konshina, D. N.
Kuban State University, Department of Chemistry and High Technologies, Krasnodar https://orcid.org/0000-0001-6271-6563
click reaction, ion exchange, modified silica
This manuscript describes the preparation of a simple effective ion-exchange material based on silica gel, on the surface of which methylimidazolium bromide is fixed using a click reaction. The resulting material was used as a stationary phase for the separation and determination of Cl–, NO2–, NO3–, I–, and SO42– using ion exchange chromatography. The separation efficiency and retention factors for the selected anions were studied in the pH range 3.5–6.5. The proposed material was used for the determination of Cl–, SO42– in water and can be suggested for successful use in real water samples.
Ural Federal University
2021-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5120
Chimica Techno Acta; Том 8, № 4 (2021)
eng
(c) 2021 D.A. Chuprynina, I.A. Lupanova, V.V. Konshin, D.N. Konshina
oai:journals.urfu.ru:article/6227
2022-12-22T16:14:24Z
chimtech:L
nmb a2200000Iu 4500
"221107 2022 eng "
2411-1414
dc
Determination of reducing carbohydrates in natural honey samples by optical micrometry method
Shchemelev, Ivan S.
Lomonosov Moscow State University
Khasanov, Danil S.
Lomonosov Moscow State University
Smirnova, Maria A.
Lomonosov Moscow State University
Ivanov, Alexander V.
Lomonosov Moscow State University; Kurnakov Institute of General and Inorganic Chemistry of RAS
Ferapontov, Nikolay B.
Lomonosov Moscow State University
Tokmachev, Mikhail G.
Lomonosov Moscow State University https://orcid.org/0000-0001-9978-1844
determination of carbohydrates; optical micrometry; sensitive polymers; chelate esters; analysis of honey
The present article deals with the determination of the total amount of glucose and fructose in natural honey samples by the optical micrometry (OM) method. (Poly)vinyl alcohol spherical granules impregnated with a 0.05 mol/l borax solution were chosen as a sensitive element. It was shown that the formation of chelate esters of boron with polymer and carbohydrates is a pH-dependent process, and that the pH range 8.5–10.0 is the most appropriate for quantifying the total amount of reducing carbohydrates because glucose and fructose are undiscriminated. The impregnated polymer is not sensitive to the sucrose presence in the solution due to the absence of cis-diol fragments in it. Subsequently, the OM method was tested in the analysis of natural honey samples. The relative standart deviation in the case of OM method is less than 6%, and the results are similar to those obtained by the iodometric titration method. This makes the OM method suitable for laboratory-scale applications.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6227
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Ivan S. Shchemelev, Danil S. Khasanov, Maria A. Smirnova, Alexander V. Ivanov, Nikolay B. Ferapontov, Mikhail G. Tokmachev
oai:journals.urfu.ru:article/6569
2023-04-10T05:45:25Z
chimtech:R
nmb a2200000Iu 4500
"230322 2023 eng "
2411-1414
dc
An overview of wastewater treatment using combined heterogeneous photocatalysis and membrane distillation
Abdulrahman, Sarah A.
University of Technology Iraq
Ibraheem, Salah S.
University of Technology Iraq https://orcid.org/0000-0003-1569-292X
Shnain, Zainab Y.
Department of Chemical Engineering
University of Technology Iraq https://orcid.org/0000-0002-3953-9623
heterogeneous photo-catalysis; membrane; photo catalytic; wastewater treatment; membrane distillation
The need for efficient remediation solutions to wastewater has risen due to the concerning prevalence of toxic organic pollutants. It is possible for the linked photocatalysis-membrane separation system to concurrently achieve the photoreaction of pollutants and their removal from wastewater in order to accomplish the goal of completely purifying the wastewater. This investigation's objective is to provide analytical overview of the photocatalytic and membrane coupling process, photocatalytic membrane reactors, and the potential applications of these technologies in the treatment of wastewater for the persistent organic matter removal. In the review, an examination of photocatalytic and membrane processes to remove organic compounds from wastewater is presented. Based on the literature analysis, it was observed that the application of photocatalytic membrane reactors is significantly influenced by a wide variety of factors. Some of these factors include pollutant concentration, dissolved oxygen, aeration, pH, and hydraulic retention time. Light intensity is another factor that has a significant influence. It was also revealed how distillation membranes work when integrated with photocatalytic process. This brief overview will help researchers understand how successful coupled photocatalytic and membrane distillation are in the treatment of wastewater containing organic pollutants.
Ural Federal University
2023-03-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6569
Chimica Techno Acta; Том 10, № 1 (2023)
eng
(c) 2023 Sarah A. Abdulrahman, Salah S. Ibraheem, Zainab Y. Shnain
oai:journals.urfu.ru:article/3455
2022-12-15T15:21:38Z
chimtech:A
nmb a2200000Iu 4500
"181022 2018 eng "
2411-1414
dc
Synthesis, crystal structure and electrophysical properties of triple molybdates containing silver, gallium and divalent metals
Kotova, Irina Yu.
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Ulan-Ude
Savina, Aleksandra A.
Baikal Institute of Nature Management, Siberian Branch, Russian Academy of Sciences, Ulan-Ude http://orcid.org/0000-0002-7108-8535
Vandysheva, Alena I.
Buryat State University, Ulan-Ude
Belov, Dmitry A.
Lomonosov Moscow State University, Moscow
Stefanovich, Sergey Yu.
Lomonosov Moscow State University, Moscow
triple molybdates; silver; gallium; solid-state synthesis; powder X-ray diffraction; Rietveld refinement; ionic conductivity
A possibility of the triple molybdates formation with both NASICON-like and NaMg3In(MoO4)5 structures in the Ag2MoO4–AMoO4–Ga2(MoO4)3 (A = Mn, Co, Zn, Ni) systems was studied by powder X-ray diffraction analysis. It was established that NASICON-like phases Ag1−xA1−xGa1+x(MoO4)3 are not formed. The triple molybdates AgA3Ga(MoO4)5 (A = Mn, Co, Zn) isostructural to triclinic NaMg3In(MoO4)5 (sp. gr. P`1, Z = 2) were synthesized and characterized. The structure of the obtained compounds was refined for AgZn3Ga(MoO4)5 according to the powder data by the Rietveld method. The structure consists of MoO4 tetrahedra, couples of edge-shared M(1)O6 octahedra, and trimers of edge-shared M(2)O6-, M(3)O6- and M(4)O6 octahedra, which are linked by the common vertices to form a 3D framework. High-temperature conductivity measurements revealed that the conductivity of AgMn3Ga(MoO4)5 at 500 °С reaches 10-2 S/cm, which is close to one of the known NASICON-type ionic conductors.
Ural Federal University
2018-10-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3455
Chimica Techno Acta; Том 5, № 3 (2018)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/3455/7420
(c) 2018 Irina Kotova, Aleksandra Savina, Alena Vandysheva, Dmitry Belov, Sergey Stefanovich
oai:journals.urfu.ru:article/6099
2022-12-22T16:14:24Z
chimtech:R
nmb a2200000Iu 4500
"220728 2022 eng "
2411-1414
dc
Introducing our new Editorial Board Members
Medvedev, Dmitry A.
Ural Federal University;
Institute of High Temperature Electrochemistry http://orcid.org/0000-0003-1660-6712
The Chimica Techno Acta (CTA) journal was established in 2014. Since then, CTA has grown into a recognized platform for reporting recent advances in engineering chemistry. We would like to express our deep appreciation to all our authors, reviewers and readers, whose valuable participation has contributed greatly to the current level of CTA.
One year ago, in a desire to further enhance the journal’s visibility and impact, a number of important changes were initiated, such as visual redesigning of the journal’s website, updating editorial policies and clarifying the Aims Scope. More importantly, we undertook a step towards expanding our Editorial Board team. As a result of this initiative, we are glad to welcome Prof. Ekaterina Kozlova from the Boreskov Institute of Catalysis and Dr. Farid Orudzhev from the Immanuel Kant Baltic Federal University as our new Editorial Board Members.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6099
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Chimica Techno Acta
oai:journals.urfu.ru:article/5103
2021-08-25T07:12:26Z
chimtech:A
nmb a2200000Iu 4500
"210610 2021 eng "
2411-1414
dc
Structural changes in V<sub>2</sub>O<sub>5</sub>-P<sub>2</sub>O<sub>5</sub> glasses: non-constant force field molecular dynamics and IR spectroscopy
Raskovalov, A. A.
Institute of High Temperature Electrochemistry of UB RAS, Yekaterinburg http://orcid.org/0000-0002-6634-4135
Saetova, N. S.
Vyatka State University, Kirov http://orcid.org/0000-0002-0721-3944
Popov, I. S.
Institute of Solid State Chemistry of UB RAS, Yekaterinburg http://orcid.org/0000-0001-8312-7071
phosphate-vanadate glasses; IR spectroscopy; non-constant force field; molecular dynamics; self-assembly
Quasi-binary phosphate-vanadate glasses have been studied by both IR spectroscopy and a novel method of molecular dynamics with a non-constant force field. This method is used for the self-assembly of structural models of glasses. The obtained models and the glass network structure are analyzed quantitatively using element distribution by the number of R–O–R bonds (R is phosphorous or vanadium) and 4-, 6-, and 8-membered cycles. The bends on the concentration dependences of atoms distribution in the second coordination sphere agree well with changing the shape of IR spectra. Based on the cycle analysis, the formation of cycles is shown to be more characteristic for vanadate fragments that can form 4-membered cycles, which, according to Zachariasen’s rule, negatively affects glass-forming ability.
Ural Federal University
2021-07-04 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5103
Chimica Techno Acta; Том 8, № 2 (2021)
eng
(c) 2020 A.A. Raskovalov, N.S. Saetova, I.S. Popov
oai:journals.urfu.ru:article/2704
2022-12-15T15:23:36Z
chimtech:A
nmb a2200000Iu 4500
"171215 2017 eng "
2411-1414
dc
Synthesis, structure and electrical properties of Mg-, Ni-codoped bismuth niobates
Koroleva, M. S.
Institute of Chemistry, Komi Science Centre, UB RAS, Syktyvkar
Piir, I. V.
Institute of Chemistry, Komi Science Centre, UB RAS, Syktyvkar
Istomina, E. I.
Institute of Chemistry, Komi Science Centre, UB RAS, Syktyvkar
pyrochlore; Bi1.6Mg0.8-xNixNb1.6O7-δ; dopant distribution; dielectric behavior; electrical conductivity
Mg-, Ni-codoped bismuth niobates Bi1.6Mg0.8-xNixNb1.6O7-δ (x = 0; 0.2; 0.4; 0.6; 0.8) were obtained by conventional solid-state reaction method. It was shown that the Mg atoms are distributed at the Nb sites while the Ni atoms are distributed over the Bi- and the Nb-sites, according to the results of comparison of pycnometric and X-ray density of the Bi1.6Mg0.4Ni0.4Nb1.6O7-δ pyrochlore. In this case, about 15–20% of the vacancies are formed at the Bi sites. The obtained compounds are stable up to their melting point based on the DSC analysis data. Real dielectric permittivity ε' of the Bi1.6Mg0.8-xNixNb1.6O7-δ samples decreases from 80 to 65 with the temperature decrease from 25 to 700 °C and practically does not depend on frequency in the range of 1–1000 kHz. Oxides Bi1.6Mg0.8-xNixNb1.6O7-δ behave like insulators up to 280 °C, their conductivity increases with temperature (Ea,dc ≈ 1.3 eV, dc) and with the Ni content at a given temperature.
Ural Federal University
2017-12-25 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2704
Chimica Techno Acta; Том 4, № 4 (2017)
eng
(c) 2017 M. S. Koroleva, I. V. Piir, E. I. Istomina
oai:journals.urfu.ru:article/5677
2022-03-20T11:41:02Z
chimtech:A
nmb a2200000Iu 4500
"220316 2022 eng "
2411-1414
dc
On the possibility of obtaining the elastic and biocompatible film materials based on chitosan and N-succinyl chitosan
Bazunova, Marina V.
Bashkir State University https://orcid.org/0000-0003-3160-3958
Lazdin, Roman Yu.
Bashkir State University https://orcid.org/0000-0003-4774-9994
Elinson, Mariya R.
Bashkir State University
Sharafutdinova, Lucia A.
Bashkir State Medical University
Mustakimov, Robert A.
Bashkir State University https://orcid.org/0000-0002-2342-7213
Kulish, Elena I.
Bashkir State University https://orcid.org/0000-0002-6240-0718
chitosan; sodium salt of N-succinyl chitosan; polyhydric alcohols; plasticization; deformation–strength properties
For the first time, the studies of polyhydric alcohols (glycerol, ethylene glycol and propylene glycol) impact on the structure, deformation–strength characteristics and hemocompatibility of the film materials based on chitosan and N-succinyl chitosan were carried out. It was shown that the introduction of polyhydric alcohols into molding solutions during the creation of the films based on chitosan and succinyl chitosan in the amount up to 0.05 mol/l is accompanied by the tensile elongation value increase by 2–2.5 times. The value of the breaking stress in this case decreases by 3–4 times. There is also a decrease in the overall surface roughness and a sharp drop in the elastic modulus of the films. The stabilizing impact of the systems based on chitosan and succinyl chitosan in the presence of glycerol and propylene glycol upon the cell membranes in physiological conditions allows inferring their high hemocompatibility.
Ural Federal University
2022-03-17 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5677
Chimica Techno Acta; Том 9, № 1 (2022)
eng
(c) 2022 Marina V. Bazunova, Roman Yu. Lazdin, Mariya R. Elinson, Lucia A. Sharafutdinova, Robert A. Mustakimova, Elena I. Kulish
oai:journals.urfu.ru:article/4768
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201227 2020 eng "
2411-1414
dc
8-Hydroxy-5-nitroquinoline as a C-nucleophilic reagent in the reaction of C, C-coupling with quinazoline
Azev, Yuri A.
Ural Federal University, Ekaterinburg
Koptyaeva, Olga S.
Ural Federal University, Ekaterinburg
Eltsov, Oleg S.
Ural Federal University, Ekaterinburg
Tsmokalyuk, Anton N.
Ural Federal University, Ekaterinburg
Pospelova, Tatyana A.
Ural Federal University, Ekaterinburg
5-nitro-8-hydroxyquinoline; quinazoline; C, C-coupling
The first example of the reaction of 5-nitro-8-hydroxyquinoline as a C-nucleophile with quinazoline is described. As a result of the reaction of C, C-coupling, a stable σ-adduct containing the drug nitroxalin on a heterocyclic carrier was obtained. The structure of the resulting adduct was confirmed by 2D 1H-13C HSQC, 1H-13C HMBC, and 1H-15N HMBC spectra.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4768
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 Yuri Azev, Olga Koptyaeva, Oleg Eltsov, Anton Tsmokalyuk, Tatyana Pospelova
oai:journals.urfu.ru:article/695
2022-12-15T15:04:44Z
chimtech:A
nmb a2200000Iu 4500
"140630 2014 eng "
2411-1414
dc
The study of self-assembly and self-organization of atomic metal nanoparticles of iron group by Monte Carlo method
Grishko, M. S.
Altai State University, Barnaul
Zhukovsky, M. S.
Altai State University, Barnaul
Beznosyuk, S. A.
Altai State University, Barnaul
nanoparticles; iron group; nanocluster; self-assembly; Monte Carlo method
В работе изложено решение задачи исследования самосборки и самоорганизации компактных наночастиц из роя атомных наночастиц группы железа на примере системы Fe-Co. Для выполнения численного эксперимента в условиях заданной температуры среды был использован метод Монте-Карло. Представлен анализ результатов компьютерной имитации синтеза наночастиц в форме кластеров магнитных атомарных наночастиц подгруппы железа в квантово-запутанном (η = 1) и квантово-незапутанном (η = 0) состояниях. Расчеты показали зависимость морфологии нанокластера от характера квантового запутывания атомарных наночастиц. Показано, что результат наносинтеза зависит не только от внешних термодинамических параметров термостата, но и от самосборки и самоорганизации наносистем за счёт активизации внутренних электронных квантовых степеней свободы.
Ural Federal University
2014-06-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/695
Chimica Techno Acta; Том 1, № 1 (2014)
rus
(c) 2014 M. S. Grishko, M. S. Zhukovsky, S. A. Beznosyuk
oai:journals.urfu.ru:article/7231
2024-01-12T19:33:09Z
chimtech:A
nmb a2200000Iu 4500
"231207 2023 eng "
2411-1414
dc
Towards controlling the morphology of cobalt loaded nanocomposites in polyol process with polyethylene glycol
Burmatova, Anastasia
Kazan Federal University
Khannanov, Artur
Kazan Federal University https://orcid.org/0000-0001-5119-8449
Zubaidullina, Liana
Kazan Federal University
Emelianov, Dmitry
Kazan Federal University https://orcid.org/0000-0002-5997-6038
Mostovaya, Olga
Kazan Federal University
Stoikov, Ivan
Kazan Federal University https://orcid.org/0000-0002-3019-7866
Ulakhovich, Nikolay
Kazan Federal University https://orcid.org/0000-0002-1959-0704
Kutyreva, Marianna
Kazan Federal University https://orcid.org/0000-0001-6674-8685
polyol process; polyethylene glycol; cobalt; nanocomposites; biocompatibility
The polyol process is one of the simple, efficient and productive methods for the synthesis of metal loaded polymer composites. Functional properties of metal-polymer nanocomposites are determined by chemical composition, size and morphology of their particles. Finding effective ways to control the nanoparticle's properties during the polyol process is a crucial task. The effect of molar ratio Mn+/OHPEG on the formation of cobalt loaded metal-polymer nanocomposites during a one-pot two-component polyol process by polyethylene glycol with Mr = 4000 g·mol–1 (PEG) was studied. The PEG-based polyol process and the formation of cobalt nanophase were studied at molar ratios νCo2+/νOH(PEG) = 1:1, 1:10, 1:100 and 1:500 using UV-Vis, diffuse reflectance IR and ATR FT-IR spectroscopy, nanoparticle tracking analysis (NTA), dynamic light scattering (DLS). It was found that PEG can act as a reducing agent and stabilizing matrix for the cobalt nanophase at a ratio higher than Mn+/OHPEG= 1:10. The composition and morphology of Co/PEG nanocomposites were determined by XRD and TEM methods. Two types of spheroid particles with average diameters of 88±55 nm / 8±4 nm and 12±3 nm / 3±1 nm, respectively, represent Co/PEG nanocomposites 1:500 and 1:100. Scaly structures with a diameter of 15±5 nm are formed at a molar ratio of νCo2+/νOH(PEG) = 1:10. An increase in the Co2+ content in the PEG-based polyol process leads to the immobilized cobalt nanophase Co3O4 (1:500), Co0/CoO (1:100), CoO (1:10) in PEG. Co/PEG nanocomposites are hemocompatible. The HC50value depends on the composition and morphology of the nanoparticles.
Ural Federal University
2024-01-10 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7231
Chimica Techno Acta; Том 10, № 4 (2023)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/7231/17465
(c) 2023 Anastasia Burmatova, Artur Khannanov, Liana Zubaidullina, Dmitry Emelianov, Olga Mostovaya, Ivan Stoikov, Nikolay Ulakhovich, Marianna Kutyreva
oai:journals.urfu.ru:article/6929
2023-11-24T12:17:56Z
chimtech:A
nmb a2200000Iu 4500
"230823 2023 eng "
2411-1414
dc
Hydrophilic molecularly imprinted phenol-amine-formaldehyde resins
Petrova, Yuliya Yu.
Surgut State University https://orcid.org/0000-0003-3702-2249
Bulatova, Elena V.
Surgut State University https://orcid.org/0000-0003-3514-3872
Zelentsov, Dmitry O.
Surgut State University https://orcid.org/0009-0007-6153-8380
Mateyshina, Yuliya G.
Institute of Solid State Chemistry and Mechanochemistry of SB RAS https://orcid.org/0000-0002-1880-7182
molecular imprinting; hydrophilic resins; sorption; rebinding; quercetin
Hydrophilic molecularly imprinted resins (MIR), which are produced using hydrophilic monomers such as phenols, aldehydes, melamine or urea, have recently attracted increasing attention for use in separation and preconcentration. Among their obvious advantages are good sorption capacity, high recovery and selectivity, as well as their reusability in aqueous solutions. In this work we applied the bulk molecular imprinting method to produce quercetin-imprinted phenol-amino-formaldehyde resin. For this purpose, phloroglucinol and melamine solutions were mixed with formaldehyde and then polyethylene glycol and quercetin (Qu) were added to the obtained solution as a porogen and a template, respectively. The mixture was stirred under heating, then left in the thermostat for a continuous time. The optimum ratio of phloroglucinol to melamine was 3:1. The average molecular mass of porogen (Mw) varied between 4000–10000 Da. The obtained MIR were eluted with ethanol-water mixture (4:1, v/v) in the Soxhlet extractor for 36 h to remove the template. The MIR were characterized by FTIR-spectroscopy, laser diffraction spectroscopy and differential thermal analysis. The maximum recovery and sorption capacity of MIR synthesized in the presence of a porogen with Mw 10000 were 47% and 4.7 μmol Qu/g, respectively. The maximum imprinting factor was 1.41. The sorption kinetics of quercetin by a non-imprinted resin (NIR) is best described by a pseudo-second-order model, while MIR has a mixed pseudo-first-second-order mechanism.
Ural Federal University
2023-07-24 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6929
Chimica Techno Acta; Том 10, № 3 (2023)
eng
(c) 2023 Yuliya Yu. Petrova, Elena V. Bulatova, Dmitry O. Zelentsov, Yuliya G. Mateyshina
oai:journals.urfu.ru:article/1691
2022-12-15T15:11:00Z
chimtech:A
nmb a2200000Iu 4500
"151225 2015 eng "
2411-1414
dc
Crystal structure and conductivity of bismuth-containing complex oxides
Buyanova, E. S.
Ural federal university,
Ekaterinburg
Emelyanova, Yu. V.
Ural federal university,
Ekaterinburg
Morozova, M. V.
Ural federal university,
Ekaterinburg
Mikhailovskaya, Z. A.
Ural federal university,
Ekaterinburg
Kaymieva, O. S.
Ural federal university,
Ekaterinburg
Zhukovskiy, V. M.
Ural federal university,
Ekaterinburg
Petrova, S. A.
Institute of metallurgy UB RAS,
Ekaterinburg
impedance spectroscopy; bismuth containing oxides; oxygen-ionic conductivity
В работе выполнено комплексное систематическое исследование различных классов висмутсодержащих оксидных соединений. Найдена взаимосвязь состава, температурных и концентрационных областей устойчивого существования, специфики структуры и свойств твердых растворов на основе ванадатов, молибдатов, ниобатов висмута. Установлены общие закономерности синтеза твердых растворов с использованием различных вариантов твердофазного и растворных методов. На этой основе сформулированы оптимальные условия получения однофазных материалов. Определены впервые и/или уточнены температурные и концентрационные границы областей гомогенности и областей устойчивого существования полиморфных модификаций твердых растворовУстановлены структурные параметры синтезированных фаз. Методом спектроскопии электрохимического импеданса выявлены характер и особенности импедансных спектров, температурных и концентрационных зависимостей электропроводности керамических материалов на основе висмутсодержащих сложных оксидов.
Ural Federal University
2015-12-25 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1691
Chimica Techno Acta; Том 2, № 4 (2015)
rus
(c) 2015 E. S. Buyanova, Yu. V. Emelyanova, M. V. Morozova, Z. A. Mikhailovskaya, O. S. Kaymieva, V. M. Zhukovskiy, S. A. Petrova
oai:journals.urfu.ru:article/1102
2022-12-15T15:10:51Z
chimtech:A
nmb a2200000Iu 4500
"150527 2015 eng "
2411-1414
dc
Electrode processes during the electrorefiniment of lead in the KCl-PbCl<sub>2</sub>-PbO melt
Pershin, P. S.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Burich, A. A.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Khalimullina, Yu. R.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Arkhipov, P. A.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Zaikov, Yu. P.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
electrochemical recovery of lead; electrolyte; cathode space
Исследовано влияние добавки оксида свинца (II) на выход по току в процессе электрорафинирования свинца в оксихлоридном расплаве KCl-PbCl2-PbO. Показано, что с увеличением концентрации PbO в эквимольной смеси KCl-PbCl2 выход по току свинца снижается. Предложен механизм электродных процессов.
Ural Federal University
2015-05-27 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1102
Chimica Techno Acta; Том 2, № 2 (2015)
rus
(c) 2015 P. S. Pershin, A. A. Burich, Yu. R. Khalimullina, P. A. Arkhipov, Yu. P. Zaikov
oai:journals.urfu.ru:article/3974
2022-12-15T15:19:15Z
chimtech:A
nmb a2200000Iu 4500
"190801 2019 eng "
2411-1414
dc
Investigations into the structure of La<sub>3</sub>Ni<sub>2−x</sub>Fe<sub>x</sub>O<sub>7±δ</sub>
Kiselev, Evgeny Alexandrovich
Ural Federal University, Ekaterinburg
Gaczynski, Piotr
Technische Universität Braunschweig, Braunschweig
Eckold, Götz
Georg-August-Universität Göttingen, Göttingen
Feldhoff, Armin
Leibniz Universität Hannover, Hannover
Becker, Klaus-Dieter
Technische Universität Braunschweig, Braunschweig
Cherepanov, Vladimir Alexandrovich
Ural Federal University, Ekaterinburg
La3Ni2O7; complex oxides; Ruddlesden-Popper phases; Mössbauer spectroscopy; crystal structure; Patterson analysis; Rietveld refinement
The room-temperature (RT) 57Fe Mössbauer spectra of the La3Ni2−xFexO7±δ oxide solid solutions of Ruddlesden-Popper-type (x = 0.05, 0.10) reveal two doublets for Fe3+ ions in octahedral coordination by oxygen. The existence of two inequivalent sites for Fe at RT is at variance with the space groups Fmmm and Cmcm (Amam) which have been reported for La3Ni2O7±δ. This unexpected finding is discussed in connection with Patterson analyses and Rietveld refinements of powder XRD data for x = 0, 0.05, and 0.10. Alternative structural models have been proposed which can explain the spectroscopic findings and which are compatible with the results from X-ray diffraction.
Ural Federal University
2019-08-05 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3974
Chimica Techno Acta; Том 6, № 2 (2019)
eng
(c) 2019 Evgeny Alexandrovich Kiselev, Piotr Gaczynski, Götz Eckold, Armin Feldhoff, Klaus-Dieter Becker, Vladimir Alexandrovich Cherepanov
oai:journals.urfu.ru:article/4468
2022-12-15T15:15:59Z
chimtech:A
nmb a2200000Iu 4500
"200511 2020 eng "
2411-1414
dc
Thermodynamics of formation of solid solutions between BaZrO<sub>3</sub> and BaPrO<sub>3</sub>
Tsvetkov, Dmitry S.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0003-4802-870X
Sereda, Vladimir V.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0002-1420-2573
Malyshkin, Dmitry A.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0002-8828-4882
Sednev-Lugovets, Anton L.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0003-3316-7766
Zuev, Andrey Yu.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0002-1593-0994
Ivanov, Ivan L.
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg https://orcid.org/0000-0001-9277-7543
doped barium zirconate; thermodynamics; thermodynamic properties prediction
A linear relationship between the standard enthalpy of formation from binary oxides, ΔfHox, and the Goldschmidt tolerance factor, t, for some AIIBIVO3 (A = Ca, Sr, Ba; B = Ti, Zr, Hf, Ce, Pr, Tb, U, Pu, Am) perovskite oxides was used for estimation of ΔfHox of Pr-substituted barium zirconates BaZr1–xPrxO3. A dependence of the relative change of the standard entropies, S298, on the relative change of the molar volumes in the reactions of formation of AIIBIVO3 (A = Ca, Sr, Ba; B = Ti, Zr, Hf, Ce) from binary oxides was also found to be linear. Using this dependence, a relatively precise method of estimating S298 was proposed, and S298 of BaPrO3 was calculated as (162.8 ± 2.8) J·mol-1·K-1. Knowing S298 of BaPrO3 and using the literature data for S298 of BaZrO3, the values of S298 of BaZr1–xPrxO3 were predicted on the assumption that BaZr1–xPrxO3 is a regular or ideal solution of BaPrO3 in BaZrO3 as evidenced by the very small enthalpy of mixing calculated based on the estimated ΔfHox. The values of standard entropy changes, ΔfSox, and Gibbs energy changes, ΔfGox, for the reactions of formation of BaZr1–xPrxO3 from BaO, ZrO2 and PrO2 were also estimated. Substituting Pr for Zr in BaZr1–xPrxO3 results in ΔfHox and ΔfGox becoming more positive, indicating the decrease of the relative stability with respect to the corresponding binary oxides. Expanded uncertainties of the estimated values of ΔfHox and ΔfGox are equal to 14 kJ∙mol-1, and those of S298 and ΔfSox – less than 2.8 J∙mol-1·K-1 and 3.5 J∙mol-1·K-1, respectively, for BaZr1–xPrxO3 (x = 0.0–1.0).
Ural Federal University
2020-06-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4468
Chimica Techno Acta; Том 7, № 2 (2020)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/4468/9788
(c) 2020 Dmitry Tsvetkov, Vladimir Sereda, Dmitry Malyshkin, Anton Sednev-Lugovets, Andrey Zuev, Ivan Ivanov
oai:journals.urfu.ru:article/720
2022-12-15T15:05:22Z
chimtech:A
nmb a2200000Iu 4500
"141231 2014 eng "
2411-1414
dc
Electrochemical copper extraction from sulphate electrolyte
Demina, E. G.
Ural federal university, Ekaterinburg
Darintseva, A. B.
Ural federal university, Ekaterinburg
Murashova, I. B.
Ural federal university, Ekaterinburg
copper refining; electrolysis; nickel; crystallization
При электролитическом рафинировании меди в растворе электролита накапливаются ионы никеля и меди, которые необходимо периодически извлекать. В промышленности извлечение меди проводят в две стадии, снижая концентрацию меди до 1 г/л. Численным моделированием установлена зависимость скорости обезмеживания от отдельных параметров: перемешивания электролита, его объема, площади катодной поверхности,. Экспериментально исследован процесс обезмеживания в спокойном электролите и при перемешивании раствора. Во всех опытах на катоде кристаллизовался гладкий, компактный осадок меди. Скорость обезмеживания при организации принудительного перемешивания выше, чем в спокойном электролите.
Ural Federal University
2014-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/720
Chimica Techno Acta; Том 1, № 3 (2014)
rus
(c) 2014 E. G. Demina, A. B. Darintseva, I. B. Murashova
oai:journals.urfu.ru:article/7353
2024-03-27T12:59:29Z
chimtech:A
nmb a2200000Iu 4500
"240201 2024 eng "
2411-1414
dc
Interaction of silica with polystyrene: mechanical properties, polymer/filler adhesion and failure behavior
Thomas, Selvin P.
Yanbu Industrial College https://orcid.org/0000-0002-6147-2461
polystyrene; composites; mechanical properties; particulate fillers; silica; modelling
Composites of polystyrene with different loading of silica were prepared by melt mixing in a Brabender Plasticorder at a rotor speed of 60 rpm. The mechanical properties of the composites such as tensile behavior, impact strength, and flexural properties were studied as a function of filler loading. The tensile moduli of the composites increased with silica content. To improve adhesion between the filler and the matrix, an amino silane coupling agent was used. The composites with coupling agents showed enhanced mechanical properties. Thermal properties were measured using differential scanning calorimetry (DSC), thermogravimetry (TGA) and flammability tests. Composites with 15 wt.% and 0.5 wt.% coupling agent showed optimum properties. Scanning electron microscopy (SEM) studies of the tensile fractured samples revealed the extent of filler dispersion and filler/matrix interaction. Finally, experimental results were compared with theoretical predictions.
Ural Federal University
2024-01-16 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7353
Chimica Techno Acta; Том 11, № 1 (2024)
eng
(c) 2023 Selvin P. Thomas
oai:journals.urfu.ru:article/7190
2024-01-12T19:33:09Z
chimtech:COR
nmb a2200000Iu 4500
"231026 2023 eng "
2411-1414
dc
Corrigendum to The impact of dimethylformamide on the synthesis of graphene quantum dots derived from graphene oxide
Truong, Khuong T.
Ho Chi Minh City University of Technology; Vietnam National University Ho Chi Minh City https://orcid.org/0000-0001-5129-3710
Pham, Thach H.
Ho Chi Minh City University of Technology; Vietnam National University Ho Chi Minh City
Tran, Khai V.
Ho Chi Minh City University of Technology; Vietnam National University Ho Chi Minh City https://orcid.org/0000-0003-0379-227X
The original article, “Khuong T. Truong, Thach H. Pham, Khai V. Tran. The impact of dimethylformamide on the synthesis of graphene quantum dots derived from graphene oxide. Chimica Techno Acta. 2023;10(4):202310405”, is available at: https://doi.org/10.15826/chimtech.2023.10.4.05
Ural Federal University
2024-01-10 00:00:00
Corrigendum
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7190
Chimica Techno Acta; Том 10, № 4 (2023)
eng
(c) 2023 Khuong T. Truong, Thach H. Pham, Khai V. Tran
oai:journals.urfu.ru:article/1940
2022-12-15T15:10:03Z
chimtech:L
nmb a2200000Iu 4500
"160723 2016 eng "
2411-1414
dc
Differentiation of 2- and 6-isomers of (2-dimethylaminopropyl)benzofuran by tandem mass spectrometry
Shevyrin, V. A.
Federal Drug Control Service of Russia, Ural federal university, Ekaterinburg
new psychoactive substances; amphetamine derivatives; chromatography – mass spectrometry; high-resolution mass spectrometry; EI spectra; CID spectra
Достоверная идентификация новых психоактивных соединений 2-(2-метиламинопропил)бензофурана и 6-(2-метиламинопропил)бензофурана проблематична при проведении анализа методом хроматомасс-спектрометрии. Установлено, что эти два изомера могут быть надежно дифференцированы по МС/МС спектрам, полученным в результате диссоциации, индуцируемой соударением, их протонированных молекул.
Ural Federal University
2016-07-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1940
Chimica Techno Acta; Том 3, № 2 (2016)
rus
(c) 2016 V. A. Shevyrin
oai:journals.urfu.ru:article/1277
2022-12-15T15:10:56Z
chimtech:A
nmb a2200000Iu 4500
"151006 2015 eng "
2411-1414
dc
Dynamics of electrocrystallization of dendritic zinc deposits in galvanostatic and potentiostatic modes
Nikitin, V. S.
Ural federal university, Ekaterinburg
Ostanina, T. N.
Ural federal university, Ekaterinburg
Rudoi, V. M.
Ural federal university, Ekaterinburg
Farlenkov, A. S.
Ural federal university, Ekaterinburg
electrocrystallization; zinc; dendritic; electrochemistry
В работе исследована динамика роста дендритных осадков цинка в гальваностатическом и потенциостатическом режимах из электролита, содержащего 0,3 моль/л ZnO и 4 моль/л NaOH. Показано, что в гальваностатических условиях наблюдается снижение скорости удлинения дендритов и изменение структуры осадка с дендритной на компактную, сопровождающееся ростом плотности и уменьшением пористости по толщине. В потенциостатических режимах дендриты растут с постоянной скоростью и структура осадка мало меняется. Полученные результаты подтверждены электронно-микроскопическими исследованиями морфологии частиц цинка.
Ural Federal University
2015-10-06 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1277
Chimica Techno Acta; Том 2, № 3 (2015)
rus
(c) 2015 V. S. Nikitin, T. N. Ostanina, V. M. Rudoi, A. S. Farlenkov
oai:journals.urfu.ru:article/5434
2021-12-28T02:27:04Z
chimtech:A
nmb a2200000Iu 4500
"211122 2021 eng "
2411-1414
dc
Synthesis and analgesic activity evaluation of derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[<i>b</i>]thiophene-3-carboxylic acid
Siutkina, Alena I.
Perm State University;
Perm State Pharmaceutical Academy https://orcid.org/0000-0001-6702-7716
Makhmudov, Ramiz R.
Perm State University;
Federal Scientific Center for Medical and Preventive Health Risk Management Technologies
Shipilovskikh, Daria A.
Perm National Research Polytechnic University
analgesic activity, Gewald reaction, 2,4-dioxobutanoic acids, 3-(thiophen-2-yl)iminofuran-2(3H)-one
The synthesis of new derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid is described. Starting 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids were obtained by intramolecular cyclisation of substituted 4-aryl-4-oxo-2-thienylaminobut-2-enoic acids in acetic anhydride. New derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acids were obtained via decyclization reaction of 2-{[5-aryl-2-oxofuran-3(2H)-ylidene]amino}thiophene-3-carboxylic acids. The structure of the compounds obtained was confirmed by the 1H and 13C NMR spectroscopy, IR spectrometry and elemental analysis methods. Analgesic activity of new compounds has been studied by the “hot plate” method on outbred white mice of both sexes with intraperitoneal injection. It was found that derivatives of 2-[(1,4-dioxo-1-amino-4-arylbutyl-2-en-2-yl)amino]-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylic acid possess analgesic effect exceeding the effect of the comparison drug metamizole.
Ural Federal University
2021-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5434
Chimica Techno Acta; Том 8, № 4 (2021)
eng
(c) 2021 Alena I. Siutkina, Ramiz R. Makhmudov, Daria A. Shipilovskikh
oai:journals.urfu.ru:article/5980
2022-12-22T16:14:24Z
chimtech:A
nmb a2200000Iu 4500
"220913 2022 eng "
2411-1414
dc
Dilatometric characteristics of weakly sintered ceramics
Komolikov, Yury I.
M.N. Mikheev Institute of Metal Physics, UB RAS
Ermakova, Larisa V.
Institute of Solid State Chemistry, UB RAS http://orcid.org/0000-0001-7839-1441
Khrustov, Vladimir R.
Institute of Electrophysics, UB RAS
Zhuravlev, Victor D.
Institute of Solid State Chemistry, UB RAS http://orcid.org/0000-0001-5933-4310
refractory oxide; weakly sintered ceramics; linear thermal expansion coefficient; thermal expansion; ceramic density
Thermal expansion of refractory ceramics CaZrO3, MgAl2O4, La2Zr2O7 and YSZ-12 was studied. The samples of the complex oxides were synthesized by solution combustion synthesis with glycine; the fuel:oxidant ratio was varied depending on the character of redox reaction. The linear thermal expansion coefficient (LTEC) of ceramics was measured on the samples with an initial density 23–52%. The maximal sinterability of 89–92% after 6 h annealing at 1550 °С was demonstrated by La2Zr2O7 and YSZ-12, and the minimal values (78–82%) – by CaZrO3 and MgAl2O4. All materials have close LTEC values, from 9.0 to 9.6·10–6 K–1.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5980
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Yury I. Komolikov, Larisa V. Ermakova, Vladimir R. Khrustov, Victor D. Zhuravlev
oai:journals.urfu.ru:article/6573
2023-04-10T05:45:25Z
chimtech:L
nmb a2200000Iu 4500
"230214 2023 eng "
2411-1414
dc
Electrochemical detection of simple alkanes by utilizing a solid-state zirconia-based gas sensor
Kalyakin, Anatoly S.
Institute of High Temperature Electrochemistry https://orcid.org/0000-0002-8816-4303
Volkov, Alexander N.
Institute of High Temperature Electrochemistry https://orcid.org/0000-0002-5184-986X
alkanes; electrochemical approaches; limiting current; diffusion; amperometric sensors; diffusion barrier
Solid-state gas sensors composed of complex oxide electrolytes offer great potential for analyzing various atmospheres at high temperatures. While relatively simple gas mixtures (H2O+N2, O2+N2) have been successfully studied by means of ZrO2-based sensors, the precise detection of more complex compounds represents a challenging task. In this work, we present our findings regarding the analysis of lower alkanes (CH4, C2H6, and C3H8) mixed with nitrogen as an inert gas, utilizing an amperometric ZrO2-based sensor. This sensor, serving as an electrochemical cell with a diffusion barrier, was tested at 500–600 °C to measure the limiting current, which depends on the gas composition and can be further used as a basis for calibration curves. In addition, the diffusion coefficients of the specified gas mixtures were successfully found and compared with references, confirming the applicability of the fabricated sensor for studying diffusion processes in wide concentration and temperature ranges.
Ural Federal University
2023-03-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6573
Chimica Techno Acta; Том 10, № 1 (2023)
eng
(c) 2023 Anatoly S. Kalyakin, Alexander N. Volkov
oai:journals.urfu.ru:article/4801
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201214 2020 eng "
2411-1414
dc
Creating a virtual device for processing the results of sorption measurements in the study of zinc oxide nanorods
Maraeva, E. V.
Saint Petersburg Electrotechnical University «LETI», Saint Petersburg
Permiakov, N. V.
Saint Petersburg Electrotechnical University «LETI», Saint Petersburg
Kedruk, Y. Y.
Satbayev University, Almaty
Gritsenko, L. V.
Satbayev University, Almaty
Abdullin, Kh. A.
al-Farabi Kazakh National University, Almaty
zinc oxide; nanorods; sorption measurements; virtual device
The work is devoted to the creation of a virtual device (computer program) for processing the results of sorption analysis of nanomaterials, including for estimating the size of nanoparticles based on the specific surface area. The obtained evaluation results were compared with the scanning electron microscopy data. Photocatalytically active zinc oxide samples were chosen as the object of the study.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4801
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 E. V. Maraeva, N. V. Permiakov, Y. Y. Kedruk, L. V. Gritsenko, Kh. A. Abdullin
oai:journals.urfu.ru:article/3170
2022-12-15T15:21:17Z
chimtech:A
nmb a2200000Iu 4500
"180731 2018 eng "
2411-1414
dc
Effect of Alkylation on the Kinetic Stability of Arsenodiester and Organoarsenicals against Hydrolysis: A Theoretical Study
Singh, Boota
Department of Computational Sciences, Central University of Punjab, Bathinda
Waliya, Rohan Ranjan
Department of Computational Sciences, Central University of Punjab, Bathinda
Santra, Sougata
Ural Federal University, Ekaterinburg
Giri, Kousik
Department of Computational Sciences, Central University of Punjab, Bathinda
Zyryanov, Grigory V.
Ural Federal University, Ekaterinburg
arsenic; arsenobetaine; arsenocholine; arsenosugar; DMA; MMA; arsenate organoarsenicals; arsonic acid; hydrolysis
Arsenic diesters have same structural and chemical properties as Pi (phosphate) diester. Beside this structural similarity, arsenate is not considered by cellular processes to replace phosphate. Quantum calculation reveals that this happens due to very high hydrolysis rate of Asi diester (As–O-bond-based compounds) as compared to Pi, but how organoarsenicals (As–C-bond-based compounds) that are produced by alkylation of Asi survive in highly aqueous tissues of marine organisms? We found that this alkylation results in lower hydrolysis rate of Asi diester. Our work concluded that alkylating effort by our body on Asi is to avoid structural ambiguity with phosphate and excrete out arsenic in the form of organoarsenicals from body.
Ural Federal University
2018-07-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3170
Chimica Techno Acta; Том 5, № 2 (2018)
eng
(c) 2018 Boota Singh, Rohan Ranjan Waliya, Sougata Santra, Kousik Giri, Grigory V. Zyryanov
oai:journals.urfu.ru:article/6015
2022-08-29T06:13:28Z
chimtech:A
nmb a2200000Iu 4500
"220726 2022 eng "
2411-1414
dc
Polymer-metal complex based on copper(II) acetate and polyvinyl alcohol: thermodynamic and catalytic properties
Maksotova, Kuralay S.
Al-Farabi Kazakh National University https://orcid.org/0000-0001-8606-5005
Kalikh, Dariya T.
Al-Farabi Kazakh National University
Omirzakova, Arnur T.
Nazarbayev University
Bakirova, Botagoz S.
Al-Farabi Kazakh National University
Akbayeva, Dina N.
Al-Farabi Kazakh National University https://orcid.org/0000-0001-9101-2418
copper(II) acetate; polyvinyl alcohol; polymer-metal complex; thermodynamic characteristics; catalysis; oxidation; white phosphorus
In this work we obtained a polymer-metal complex by mixing aqueous solution of copper(II) acetate with PVA at a certain ratio, pH of the solution and temperature. The composition of the complex compound was determined by potentiometric and conductometric titration. The possibility of a complex formation was proved by calculating thermodynamic characteristics. The stability constant of the polymer-metal complex was calculated on the basis of the modified Bjerrum’s method. The metal-polymer complex was synthesized in the ratio 1:2. IR spectroscopy and scanning electron microscopy (SEM) confirmed the coordination of polymeric PVA ligand to copper and allowed evaluating the morphology and features of the complex surface. The catalytic activity of the synthesized compound was evaluated in the oxidation reaction of elemental phosphorus (P4) by oxygen in aqueous-organic media under mild conditions. Quantitative analysis of phosphoric acid was made by photocolorimetric method. We found that the oxidation process of P4 in the presence of the complex Cu(PVA)2(OAc)2 in aqueous-organic media is characterized with the maximum absorption rate, in comparison with Cu(OAc)2·H2O oxidation process with P4, and yields up to 97% of the products. The process of oxidation of yellow phosphorus by oxygen in the presence of the copper(II)-PVA complex proceeds through key reactions of two-electron reduction of the catalyst P4 with the formation of intermediate phosphorus-containing products P3+ and the stages of catalyst regeneration by oxygen. Twenty-electron oxidation of P4 to the phosphorus-containing P5+ products involves 10 two-electron redox reactions and a number of complexation or hydrolysis stages.
Ural Federal University
2022-09-01 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6015
Chimica Techno Acta; Том 9, № 3 (2022)
eng
(c) 2022 Kuralay S. Maksotova, Dariya Т. Kalikh, Arnur T. Omirzakova, Botagoz S. Bakirova, Dina N. Akbayeva
oai:journals.urfu.ru:article/5072
2021-08-25T07:12:26Z
chimtech:A
nmb a2200000Iu 4500
"210507 2021 eng "
2411-1414
dc
Electrophoretic deposition of coatings and bulk compacts using magnesium-doped aluminum oxide nanopowders
Kalinina, E. G.
Institute of Electrophysics, Ural Brunch of Russian Academy of Sciences, Yekaterinburg; Ural Federal University, Yekaterinburg https://orcid.org/0000-0002-5637-7451
Rusakova, D. S.
Ural Federal University, Yekaterinburg
Pikalova, E. Yu.
Ural Federal University, Yekaterinburg; Institute of High Temperature Electrochemistry, Ural Brunch of Russian Academy of Sciences, Yekaterinburg https://orcid.org/0000-0001-8176-9417
aluminum oxide; nanopowder; stable suspension; zeta potential; electrophoretic deposition; bulk compacts
The electrophoretic deposition (EPD) of coatings and bulk compacts in a wide range of thicknesses (from 23 to 1800 μm) from stable suspensions of a magnesium-doped aluminum oxide nanopowder with subsequent sintering of samples into dense ceramics was studied. The initial nanopowder was obtained by the method of electric explosion of an Al-Mg alloy wire with a Mg content of 1.3 wt. %. The study of the dispersion composition, kinetics of deaggregation under the ultrasonic treatment and zeta potential in the nanopowder-based suspensions was carried out. It was shown that a nearly linear increase in the deposited mass and thickness of EPD deposits occurred at a constant voltage of 20 V and an average deposition current of approximately 40 μA when the deposition time was varied from 1 to 180 min. Drying of the coatings with a thickness of less than 35 μm led to the formation of a net of small cracks, while drying of the bulk compacts with a thickness of more than 1 mm occurred without cracking. The ceramic bulk sample with a thickness of 1.2 mm and the density of 98.7% TD was successfully obtained by sintering at 1650 °C for 4 h. It was characterized by a dense grain structure with an average grain size of 5 μm and the presence of a small number of closed pores less than 1 μm in size. Sintering of ceramics was revealed to be accompanied by the formation of a MgAl2O4 crystalline spinel phase, localized mainly at grain boundaries.
Ural Federal University
2021-07-04 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5072
Chimica Techno Acta; Том 8, № 2 (2021)
eng
(c) 2021 Elena G. Kalinina, Darya S. Rusakova, Elena Yu. Pikalova
oai:journals.urfu.ru:article/2607
2022-12-15T15:23:24Z
chimtech:A
nmb a2200000Iu 4500
"170906 2017 eng "
2411-1414
dc
Resistance of industrial nickel-containing methanation catalysts to the poisoning by organic carbon dioxide absorbents
Efremov, V. N.
OOO "NIAP-Katalizator", Novomoskovsk
Golosman, E. Z.
OOO "NIAP-Katalizator", Novomoskovsk
Kashinskaya, A. V.
OOO "NIAP-Katalizator", Novomoskovsk
Mugenov, T. I.
Novomoskovsk Institute (branch) of the "Dmitry Mendeleev University of Chemical Technology of Russia", Novomoskovsk
Zolotareva, V. E.
Novomoskovsk Institute (branch) of the "Dmitry Mendeleev University of Chemical Technology of Russia", Novomoskovsk
Polivanov, B. I.
OOO "NIAP-Katalizator", Novomoskovsk
Polushin, A. P.
JSC "Novomoskovsk joint stock company AZOT", Novomoskovsk
nickel-containing catalyst; calcium aluminate; methantion; solution of methyldiethanolamine; hydrogenation; carbon oxides; catalytic activity; mechanical strength
We report the results of studies on the influences of the organic carbon dioxide absorbent – aqueous solution of activated methyldiethanolamine (MDEA) – on the physico-chemical and mechanical characteristics of nickel-alumina catalyst NIAP-07-01 (NKM-1) and cement-containing catalysts NIAP-07-07 (NKM-7), Meth-134 and Meth-135 for the hydrogenation of carbon oxide (methanation). It is established that for the nickel-alumina and nickel-cement-containing catalysts subjected to activated methyldiethanolamine (MDEA) it’s possible to restore their strength and catalytic properties. In order to increase the time of operation of the methanator it is recommended to apply a new Nickel cement-containing catalyst NIAP-07-07 (NKM-7), which can be produced as tablets, rings or extrudates.
Ural Federal University
2017-10-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2607
Chimica Techno Acta; Том 4, № 3 (2017)
eng
(c) 2017 V. N. Efremov, E. Z. Golosman, A. V. Kashinskaya, T. I. Mugenov, V. E. Zolotareva, B. I. Polivanov, A. P. Polushin
oai:journals.urfu.ru:article/5477
2022-03-20T11:41:02Z
chimtech:L
nmb a2200000Iu 4500
"220114 2022 eng "
2411-1414
dc
Features of -C-C- coupling of quinoxaline-2-one with ethyl acetoacetate under acid catalysis
Azev, Y. A.
Ural Federal University
Koptyaeva, O. S.
Ural Federal University
Mkrtchan, A. A.
Ural Federal University
Pospelova, T. A.
Ural Federal University
quinoxaline-2-one; ethyl acetoacetate; nucleophilic substitution of hydrogen; vicarious substitution; acid catalysis
Quinoxalin-2-one (1) reacts with ethyl acetoacetate in trifluoroacetic acid (TFA) to form 3-(2-oxopropylideno)-3,4-dihydroquinoxaline-2-one (2) and 3-(3-oxo-3,4- dihydroquinoxaline-2-(1H)-ylidene)methylquinoxaline-2-(1H)-one (3). The reaction product 3 was also obtained by heating the compound 1 with acetone in the presence of TFA.
Ural Federal University
2022-03-17 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5477
Chimica Techno Acta; Том 9, № 1 (2022)
eng
(c) 2021 Y.A. Azev, O.S. Koptyaeva, A.A. Mkrtchan, T.A. Pospelova
oai:journals.urfu.ru:article/6325
2023-04-10T05:45:25Z
chimtech:A
nmb a2200000Iu 4500
"221216 2022 eng "
2411-1414
dc
Synthesis, intramolecular cyclization and anti-inflammatory activity of substituted 2-(2-(Furan-2-carbonyl)hydrazono)-4-oxobutanoic Acids
Igidov, Sergei N.
Perm State Pharmaceutical Academy; Merck LLC https://orcid.org/0000-0001-6006-168X
Lipin, Dmitriy V.
Perm State National Research University https://orcid.org/0000-0003-2746-1395
Turyshev, Aleksey Yu.
Perm State Pharmaceutical Academy https://orcid.org/0000-0003-3867-5305
Chashchina, Svetlana V.
Perm State Pharmaceutical Academy
Shipilovskikh, Daria A.
Perm National Research Polytechnic University http://orcid.org/0000-0001-6086-4300
Zvereva, Ol’ga V.
Perm State Pharmaceutical Academy
Mitusova, Ksenia A.
Peter the Great St. Petersburg Polytechnic University https://orcid.org/0000-0002-3820-4899
Silaichev, Pavel S.
Perm State National Research University https://orcid.org/0000-0002-2840-6809
Igidov, Nazim M.
Perm State Pharmaceutical Academy https://orcid.org/0000-0003-0976-9951
dioxobutanoic acids; 2-hydrazono-4-oxobutanoic acids; 3-hydrazonofuran-2(3H)-ones; anti-inflammatory activity; drugs
A method was proposed for the synthesis of substituted 2-(2-(furan-2-carbonyl)hydrazono)-4-oxobutanoic acids by the reaction of substituted 2,4-dioxobut-2-enoic acids with furan-2-carbohydrazide. It was found that substituted 2-(2-(furan-2-carbonyl)hydrazono)-4-oxobutanoic acids undergo intramolecular cyclization in the presence of propionic anhydride to form the corresponding N'-(2-oxofuran-3(2H)-ylidene)furan-2-carbohydrazides. The anti-inflammatory activity of the obtained compounds was studied. It was found that the obtained compounds have pronounced anti-inflammatory activity.
Ural Federal University
2023-03-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6325
Chimica Techno Acta; Том 10, № 1 (2023)
eng
(c) 2022 Sergei N. Igidov, Dmitriy V. Lipin, Aleksey Yu. Turyshev, Svetlana V. Chashchina, Daria A. Shipilovskikh, Ol’ga V. Zvereva, Ksenia A. Mitusova, Pavel S. Silaichev, Nazim M. Igidov
oai:journals.urfu.ru:article/4636
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201220 2020 eng "
2411-1414
dc
New monomers for (bi)pyridine-containing polymers
Krinochkin, A. P.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Savchuk, M. I.
Ural Federal University, Ekaterinburg
Starnovskaya, E. S.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Shtaitz, Y. K.
Ural Federal University, Ekaterinburg
Kopchuk, D. S.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Nikonov, I. L.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Kovalev, I. S.
Ural Federal University, Ekaterinburg
Zyryanov, G. V.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Rusinov, V. L.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Chupakhin, O. N.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
monomers; 1,2,4-triazines; (bi)pyridines; inverse demand Diels-Alder reaction
Convenient methods for the synthesis of three monomers based on functionalized (bi)pyridines with using “1,2,4-triaizine” methodology have been developed.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4636
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 Krinochkin A.P., Savchuk M.I., Starnovskaya E.S., Shtaitz Y.K., Kopchuk D.S., Nikonov I.L., Kovalev I.S., Zyryanov G.V., Rusinov V.L., Chupakhin O.N.
oai:journals.urfu.ru:article/6708
2023-08-17T03:09:13Z
chimtech:A
nmb a2200000Iu 4500
"230504 2023 eng "
2411-1414
dc
Synthesis and cytotoxic activity of (2-arylquinazolin-4-yl)hydrazones of 2-hydroxybenzaldehydes
Nosova, Emiliya V.
Ural Federal University; I. Postovsky Institute of Organic Synthesis http://orcid.org/0000-0002-0177-1582
Butorin, Ilya I.
Ural Federal University https://orcid.org/0000-0003-3403-5079
Likhacheva, Margarita D.
Ural Federal University
Kotovskaya, Svetlana K.
Ural Federal University
2-arylquinazolines; salicylidenhydrazines; in silico activity; casein kinase 2 inhibitor; cytotoxic activity
2-Phenyl-6,7-difluoro and 2-(4-fluorophenyl)quinazoline derivatives bearing salicylidenhydrazino fragments at position 4 were prepared based on 4,5-difluoroantranilic acid or anthranilamide. Molecular docking to casein kinase 2 was performed; compounds with high in silico activity to CK2 were revealed. Cytotoxic activity of the synthesized compounds was studied on cancer cell line MDA-MB-231 and normal cell line WI26 VA4.
Ural Federal University
2023-07-18 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6708
Chimica Techno Acta; Том 10, № 2 (2023)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/6708/15977
(c) 2023 Emiliya V. Nosova, Ilya I. Butorin, Margarita D. Likhacheva, Svetlana K. Kotovskaya
oai:journals.urfu.ru:article/729
2022-12-15T15:04:44Z
chimtech:A
nmb a2200000Iu 4500
"140630 2014 eng "
2411-1414
dc
The synthesis and alkylation of p-tetrakischloro-calix[4]arene
Ivanova, E. A.
Y-Synthesis, Ekaterinburg
Glukhareva, T. V.
Y-Synthesis, Ekaterinburg
Morzherin, Yu. Yu.
Y-Synthesis, Ekaterinburg
calixarene; chlorination; selectivity; alkylation
Работа посвящена разработке технологии хлорирования каликсаренов и отработке методик их получения, для исследования биологической активности полученных соединений. Были разработаны удобные новые, неописанные в литературе способы получения хлорзамещенных каликсаренов с использованием хлористого сульфурила и гипохлорита натрия. При использовании в качестве исходного вещества детретбутилированного каликс[4]арена, замещенного по нижнему ободу остатками хлоруксусной кислоты или эфира, было показано, что образуется неразделимая смесь продуктов. В отличие от замещенных каликсаренов, неалкилированный по нижнему ободу каликсарен хлорируется с хорошим выходом (до 95 %) с образованием тетракисхлоркаликсарена. При использовании в качестве хлорирующего реагента гипохлорита натрия протекает также омыление сложноэфирных групп под действием гидроксида натрия, выделяющегося в ходе реакции, и реакция хлорирования приводит к образованию хлорированной тетракислоты.
Ural Federal University
2014-06-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/729
Chimica Techno Acta; Том 1, № 1 (2014)
rus
(c) 2014 E. A. Ivanova, T. V. Glukhareva, Yu. Yu. Morzherin
oai:journals.urfu.ru:article/7122
2024-01-12T19:33:09Z
chimtech:L
nmb a2200000Iu 4500
"231116 2023 eng "
2411-1414
dc
Kinetics of nitric acid leaching of bornite and chalcopyrite
Shklyaev, Yuri
Ural Federal University
Dizer, Oleg
Ural Federal University https://orcid.org/0000-0001-7705-0864
Lugovitskaya, Tatiana
Ural Federal University https://orcid.org/0000-0002-8286-0711
Golovkin, Dmitry
Ural Federal University https://orcid.org/0000-0001-6308-4086
Rogozhnikov, Denis
Ural Federal University https://orcid.org/0000-0002-5940-040X
copper; chalcopyrite; bornite; leaching; nitric acid; kinetics
The paper presents a study of the process of nitric acid dissolution of the natural minerals chalcopyrite and bornite. The influence of various parameters, including temperature, nitric acid concentration and particle sizes, on this process was examined. Based on the data obtained, the values of apparent activation energy (57.41 and 42.98 kJ/mol for chalcopyrite and bornite, respectively), empirical orders with respect to nitric acid (1.62 and 1.57 for chalcopyrite and bornite, respectively) and with respect to particle size (–1.16 and –2.53 for chalcopyrite and bornite, respectively) were calculated using the shrinking core model. Generalized kinetic equations for the dissolution process of both minerals were derived. Based on the calculations performed, it was suggested that the dissolution processes of chalcopyrite and bornite under these conditions are limited by internal diffusion.
Ural Federal University
2024-01-10 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7122
Chimica Techno Acta; Том 10, № 4 (2023)
eng
(c) 2023 Yuri Shklyaev, Oleg Dizer, Tatiana Lugovitskaya, Dmitry Golovkin, Denis Rogozhnikov
oai:journals.urfu.ru:article/6930
2023-11-24T12:17:56Z
chimtech:A
nmb a2200000Iu 4500
"230808 2023 eng "
2411-1414
dc
Decomposition of light hydrocarbons on a Ni-containing glass fiber catalyst
Popov, M. V.
Gazpromneft – Industrial innovations LLC https://orcid.org/0000-0002-0648-4160
Chudakova, M. V.
Gazpromneft – Industrial innovations LLC
Kurmashov, P. B.
Novosibirsk State Technical University https://orcid.org/0000-0002-6263-3634
Bannov, A. G.
Novosibirsk State Technical University; https://orcid.org/0000-0001-5868-9013
Kleimenov, A. V.
Gazprom Neft PJSC https://orcid.org/0000-0001-8797-9175
carbon nanofibers; hydrogen; glass fiber; hydrocarbons; synthesis
The work is devoted to the study of the novel process of catalytic decomposition of light hydrocarbons on a catalyst at temperatures of 550 °С and 600 °C at various pressures. The CVD process is a new COx-free approach for hydrogen production. A glass fiber fabric was used as a catalyst, which was preliminarily modified by the application of additional outer layers of NiO and porous silica. A technical mixture of propane and butane was used as feedstock. The main purpose is to investigate the effects of pressure and temperature on the production of hydrogen and carbon nanofibers over a glass-based catalyst. As a result of the decomposition of the mixture, the yield of hydrogen was 266–848 L/gcat, and that of carbon nanofibers was 3–10 g/gcat. Increasing the pressure of propane-butane mixture decomposition led to an increase of the catalyst lifetime. The highest yield of hydrogen and carbon nanofibers was achieved at 1 bar and 600 °C.
Ural Federal University
2023-07-24 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6930
Chimica Techno Acta; Том 10, № 3 (2023)
eng
(c) 2023 M.V. Popov, M.V. Chudakova, P.B. Kurmashov, A.G. Bannov, A.V. Kleimenov
oai:journals.urfu.ru:article/1097
2022-12-15T15:10:46Z
chimtech:A
nmb a2200000Iu 4500
"150329 2015 eng "
2411-1414
dc
Reaction of 4-acetyl-1,2,3-triazol-5-olate with hydrazine derivatives
Khazhieva, I. S.
Y-Synthesis, Ekaterinburg
Glukhareva, T. V.
Y-Synthesis, Ekaterinburg
Morzherin, Yu. Yu.
Y-Synthesis, Ekaterinburg
1,2,3-Triazoles; rearrangement; hydrazine; bis-triazoles; organic synthesis
1,2,3-Триазолы привлекают внимание своей способностью к раскрытию цикла с образованием α-диазоимина и внутримолекулярным перегруппировкам и трансформациям с образованием различных гетероциклических систем. Ранее нами было изучено взаимодействие 1,2,3-триазолата натрия с гидрохлоридами аминов, приводящее к образованию изомерных 1,2,3-триазолов. В данной работе мы представляем исследование взаимодействия 4-ацетил-1,2,3-триазол-5-олата натрия с производными гидразина. Были получены производные 5-метил-1,2,3-триазол-4-фенилкарбоксамидов и бис-фениламид-5,5’-диметил-[1,1’]би[[1,2,3]триазолил]-4,4’-дикарбоновой кислоты.
Ural Federal University
2015-03-29 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1097
Chimica Techno Acta; Том 2, № 1 (2015)
rus
(c) 2015 I. S. Khazhieva, T. V. Glukhareva, Yu. Yu. Morzherin
oai:journals.urfu.ru:article/3690
2022-12-15T15:18:08Z
chimtech:R
nmb a2200000Iu 4500
"190213 2019 eng "
2411-1414
dc
New opportunities for the synthesis of quinoxaline derivatives
Koptyaeva, Olga S.
Ural Federal University, Ekaterinburg
Azev, Yuriy A.
Ural Federal University, Ekaterinburg
Shafran, Yuriy M.
Ural Federal University, Ekaterinburg
Pospelova, Tatyana A.
Ural Federal University, Ekaterinburg
Chupakhin, Oleg N.
Ural Federal University, Ekaterinburg; Postovsky Institute of Organic Synthesis, Ekaterinburg
quinoxalines; 6,7-difluoroquinoxalines; quinoxalin-2-ones; 6,7-dufluoroquinoxalin-2-ones; nucleophiles
Convenient methods for the synthesis of quinoxaline derivatives with the use of nucleophilic aromatic substitution of hydrogen in heteroaromatic part of molecule in conditions of the acid catalysis were elaborated. The reactions of substitution of fluorine with amines in aromatic ring of 6,7-difluoroquinoxaline with the formation of monofluoro derivatives were studied.
Ural Federal University
2019-03-29 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3690
Chimica Techno Acta; Том 6, № 1 (2019)
eng
(c) 2019 Olga Koptyaeva, Yuriy Azev, Yuriy Shafran, Tatyana Pospelova, Oleg Chupakhin
oai:journals.urfu.ru:article/4291
2022-12-15T15:20:00Z
chimtech:A
nmb a2200000Iu 4500
"191230 2019 eng "
2411-1414
dc
Determination of Bi in complex oxide samples by atomic absorption spectrometry by using ordinary acetylene – air flame atomization
Mikhaylovskaya, Zoya A.
Zavaritsky Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg; Ural Federal University, Ekaterinburg http://orcid.org/0000-0002-0050-9216
Buyanova, Elena S.
Ural Federal University, Ekaterinburg
Smirnov, Denis Yu.
Zavaritsky Institute of Geology and Geochemistry of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg
determination of bismuth; flame atomic absorption spectrometry; analysis of solid oxides
In the present work the air/acetylene flame atomic absorption spectrometry was used for bismuth determination in complex oxides. Interference studies were carried out, and interference with vanadium and molybdenum was detected. The method of standard additions and traditional calibration curve method were used. Calibration and standard addition curves were fitted with linear and polynomial functions. It was shown that using polynomial function gives better results for the standard additions method for determination of bismuth by acetylene/air flame atomic absorption spectrometry. The calibration curve method was shown to be correct at low ( 10mg/L) concentration of an interferent.
Ural Federal University
2019-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4291
Chimica Techno Acta; Том 6, № 4 (2019)
eng
(c) 2019 Zoya A. Mikhaylovskaya, Elena S. Buyanova, Denis Yu. Smirnov
oai:journals.urfu.ru:article/5881
2022-06-22T10:04:57Z
chimtech:A
nmb a2200000Iu 4500
"220512 2022 eng "
2411-1414
dc
Peculiarities of electrophoretic deposition and morphology of deposited films in non-aqueous suspensions of Al<sub>2</sub>O<sub>3</sub>–Al nanopowder
Kalinina, Elena G.
Institute of Electrophysics, UB RAS; Ural Federal University https://orcid.org/0000-0002-5637-7451
Rusakova, Darya S.
Institute of Electrophysics, UB RAS; Ural Federal University
Pikalova, Elena Yu.
Ural Federal University; Institute of High Temperature Electrochemistry, UB RAS https://orcid.org/0000-0001-8176-9417
electrophoretic deposition; electric explosion of wire; alumina weakly aggregated nanopowder; non-aqueous suspension; zeta potential
The paper presents the results of a comprehensive study of the electrokinetic properties of non-aqueous suspensions of the Al2O3–Al nanopowder obtained by the method of electric explosion of wires (EEW) with 0.3 wt.% of metallic aluminum in its composition. The dependence of zeta potential on the concentration of the Al2O3–Al suspension is revealed. The nature of long-term changes in zeta potential and pH in suspensions is established. Appearance of bubbles in the deposited coatings due to the interaction of metallic aluminum particles with the liquid suspension medium during electrochemical reactions on the electrodes is defined as the main feature of the electrophoretic deposition (EPD) process in the Al2O3–Al suspensions. The influence of the suspension preparation method on the deposited coatings’ morphology is demonstrated.
Ural Federal University
2022-06-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5881
Chimica Techno Acta; Том 9, № 2 (2022)
eng
(c) 2022 Elena G. Kalinina, Darya S. Rusakova, Elena Yu. Pikalova
oai:journals.urfu.ru:article/6074
2022-12-22T16:14:24Z
chimtech:A
nmb a2200000Iu 4500
"220816 2022 eng "
2411-1414
dc
Electrochemical behavior of chloramphenicol on carbon electrodes in a microelectrochemical cell
Svalova, Tatiana S.
Ural Federal University
Zaidullina, Regina A.
Ural Federal University
Medvedeva, Margarita V.
Ural Federal University
Vedernikova, Elizaveta D.
Ural Federal University
Kozitsina, Alisa N.
Ural Federal University https://orcid.org/0000-0002-0263-2111
chloramphenicol; express-determination; electrochemical behavior; voltammetry; microcell; screen-printed electrode
Express determination of antibiotics is an extremely important task today. Portable electrochemical microdevices are a viable alternative to traditional methods of analysis. The development of such devices requires the study of redox processes in detail. This article is devoted to the comparative study of the electrochemical behavior of chloramphenicol in water solvents in standard laboratory and portable microelectrochemical cells. It was found that the electrochemical reduction of chloramphenicol proceeds via a 3-electron mechanism to the formation of a dimer. In the transition from the macrocell to the microcell, a decrease in the electrochemical reduction current and a shift of the peak potential to the cathode region are observed, which is apparently associated mainly with the type of the electrode material. The best characteristics of the direct electrochemical response were obtained in the differential pulse voltammetry mode. Under the selected operating parameters, the peak current of the electrochemical reduction of chloramphenicol is linearly dependent on the concentration of the antibiotic in the range of 2∙10–3–1∙10–5 M with a detection limit of 3∙10–5 M. Obtained characteristics are sufficient for the quality control of pharmaceuticals and can be improved through the use of organic and hybrid modifiers of the working electrode surface.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6074
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Tatiana S. Svalova, Regina A. Zaidullina, Margarita V. Medvedeva, Elizaveta D. Vedernikova, Alisa N. Kozitsina
oai:journals.urfu.ru:article/4537
2022-12-15T15:16:26Z
chimtech:A
nmb a2200000Iu 4500
"200901 2020 eng "
2411-1414
dc
Synthetic approaches to 2-aryl/hetaryl- and 2-(hetaryl)ylidene derivatives of fluorinated 1,3-benzothiazin-4-ones
Nosova, Emiliya V.
Ural Federal University, Ekaterinburg; I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
Batanova, Olga A.
Ural Federal University, Ekaterinburg
Mochulskaya, Nataliya N.
Ural Federal University, Ekaterinburg
Lipunova, Galina N.
I.Ya. Postovsky Institute of Organic Synthesis of RAS, Ekaterinburg
1,3-benzothiazin-4-ones; 2-fluorobenzoylchloride; 2-fluorobenzoyl-isothiocyanate; indole; pyrrole; cyanomethylbenzimidazole; benzoylmethylbenzimidazole; thioamide; cyclocondensation; tuberculostatics
A series of 2-hetaryl- and 2-(hetaryl)ylidene substituted 5-fluoro-8-nitro-1,3-benzothiazin-4-ones was synthesized by interaction of 2,6-difluoro-3-nitrobenzoylisothiocyanate with C-nucleophiles. Cyclocondensation of polyfluorobenzoylchlorides with aryl and hetaryl thioamides represents new approach to 1,3-benzothiazin-4-ones. Some compounds proved to be promising for further development of tuberculostatic agents.
Ural Federal University
2020-10-07 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4537
Chimica Techno Acta; Том 7, № 3 (2020)
eng
(c) 2020 Emiliya V. Nosova, Olga A. Batanova, Nataliya N. Mochulskaya, Galina N. Lipunova
oai:journals.urfu.ru:article/5903
2022-12-12T08:52:03Z
chimtech:R
nmb a2200000Iu 4500
"220627 2022 eng "
2411-1414
dc
Slow-release agricultural pesticide formulations: state of the art
Boyandin, Anatoly N.
Reshetnev Siberian State University of Science and Technology;
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences” http://orcid.org/0000-0002-9190-2792
Sukhanova, Anna A.
Reshetnev Siberian State University of Science and Technology https://orcid.org/0000-0002-5830-1450
Ertiletskaya, Natalya L.
Reshetnev Siberian State University of Science and Technology;
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences” https://orcid.org/0000-0003-2626-893X
plant protection; pesticide; long-term release; organomodified clay; biodegradable polymer; composite
The need for a long-term sustaining of optimal concentrations of applied pesticides in the soil in agriculture resulted in the development of systems for controlled release of active substances. Such systems are based on the use of eco-friendly carrier materials that are harmless to plants, humans and environment. Inorganic substances (e.g., clays or alike substances), biodegradable polymers of natural or synthetic origin, blends of such polymers and their composites with inorganic fillers can be used as carriers. The deposited pesticides are released by diffusion or, in the case of systems based on biodegradable polymers, by degradation of the carrier. Inorganic carriers are usually impregnated with a pesticide. As for polymers, there is a wide range of methods for obtaining forms. Namely, these are the microsphere and nanoparticle formation, film casting, tablet pressing, form gelatinizing, and coprecipitation of a pesticide and a polymer from a solution. Co-extrusion of pesticides with polymers or their composites at temperatures below the degradation temperature of the components is another promising method for obtaining pesticide carriers.
Ural Federal University
2022-08-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5903
Chimica Techno Acta; Том 9, № 2S (2022): Supplement
eng
(c) 2022 Anatoly N. Boyandin, Anna A. Sukhanova, Natalya L. Ertiletskaya
oai:journals.urfu.ru:article/5979
2022-12-22T16:14:24Z
chimtech:L
nmb a2200000Iu 4500
"220712 2022 eng "
2411-1414
dc
Phosphorus-doped protonic conductors based on BaLa<sub>n</sub>In<sub>n</sub>O<sub>3n+1</sub> (n = 1, 2): applying oxyanion doping strategy to the layered perovskite structure
Tarasova, Nataliia
Institute of High Temperature Electrochemistry https://orcid.org/0000-0001-7800-0172
Galisheva, Anzhelika
Institute of High Temperature Electrochemistry https://orcid.org/0000-0003-4346-5644
layered perovskite; oxyanion doping; phosphorus doping; proton conductivity; BaLaInO4; BaLa2In2O7
The creation of highly efficient and eco-friendly energy sources such as hydrogen energy systems is one of main vectors for the sustainable development of human society. Proton-conducting ceramic materials can be applied as one of the main components of such hydrogen- fueled electrochemical devices, including protonic ceramic fuel cells. The oxyanion doping strategy is a promising approach for improving transport properties of proton-conducting complex oxides. In this paper, this strategy was applied to proton-conducting layered perovskites for the first time. The phosphorus-doped protonic conductors based on BaLanInnO3n+1 (n = 1, 2) were obtained, and their electrical conductivity was thoroughly investigated. It was found that the phosphorous doping leads to an increase in the electrical conductivity values by ~0.7 orders of magnitude.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5979
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Nataliia Tarasova, Anzhelika Galisheva
oai:journals.urfu.ru:article/4827
2021-08-25T07:12:26Z
chimtech:A
nmb a2200000Iu 4500
"210428 2021 eng "
2411-1414
dc
Cation-exchange resins as heterogeneous catalysts for the synthesis of 1,3-butadiene from propylene and formaldehyde
Kutuzova, T. M.
Kazan National Research Technological University, Kazan
Kuznetzova, O. M.
Kazan National Research Technological University, Kazan
Akhmedyanova, R. A.
Kazan National Research Technological University, Kazan
1,3-butadiene; cation exchange resin; formaldehyde; propylene; monomer; petrochemical synthesis
The possibility of using the cation-exchange resin Lewatit K2420 as a catalyst for the synthesis of 1,3-butadiene from isopropyl alcohol and formaldehyde solution in one technological stage has been shown. The regularities of the process have been established and the influence of the formaldehyde form (a cyclic trimer 1,3,5-trioxane and a 37% solution in water) on the composition of the reaction mass and the yield of the main and by-products has been assessed. It has been shown that the Lewatit K2420 heterogeneous catalyst showed catalytic activity in all reactions occurring in the synthesis of 1,3-butadiene, including the decomposition of 1,3,5-trioxane, dehydration of isopropyl alcohol into propylene, condensation of propylene and formaldehyde, dehydration of 3-butene-1-ol, decomposition of 4-methyl-1,3-dioxane, etc.
Ural Federal University
2021-07-04 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4827
Chimica Techno Acta; Том 8, № 2 (2021)
eng
(c) 2021 Tatyana Mikhailovna Kutuzova, Oksana Mikhailovna Kuznetzova, Raisa Akhtyamovna Akhmedyanova
oai:journals.urfu.ru:article/2378
2022-12-15T15:23:09Z
chimtech:A
nmb a2200000Iu 4500
"170909 2017 eng "
2411-1414
dc
Interaction of iron oxide nanoparticles synthesized by laser target evaporation with polyacrylamide in composites and ferrogels
Scharf, F.
TU Dresden, Dresden
Mikhnevich, E.
Ural Federal University, Ekaterinburg
Safronov, A.
Institute of Electrophysics UB RAS, Ekaterinburg
nanoparticles; iron oxide; composites; ferrogels; polyacrylamide
Iron oxide magnetic nanoparticles (MNPs) with average diameter 11.7 nm synthesized by laser target evaporation were used for the synthesis of composites and ferrogels based on polyacrylamide network. The chemical composition of MNPs corresponded to maghemite. It was shown that intact MNPs strongly interacted with polyacrylamide polymeric network, while the adsorption of electrostatic stabilizer on the surface of MNPs efficiently prevents such interaction. Synthesis of ferrogels was performed by the radical polymerization of acrylamide in electrostatically stabilized suspensions of MNPs in water. It was shown that the molecular structure, water uptake, and compression modulus can be controlled by the concentration of monomer taken in the synthesis.
Ural Federal University
2017-07-14 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2378
Chimica Techno Acta; Том 4, № 2 (2017)
eng
(c) 2017 F. Scharf, E. Mikhnevich, A. Safronov
oai:journals.urfu.ru:article/5568
2021-12-28T02:27:04Z
chimtech:A
nmb a2200000Iu 4500
"211223 2021 eng "
2411-1414
dc
Benzo[<i>de</i>]naphtho[1,8-<i>gh</i>]quinolines: synthesis, photophysical studies and nitro explosives detection
Nikonov, Igor L.
Ural Federal University;
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS https://orcid.org/0000-0002-2493-0056
Khalymbadzha, Igor A.
Ural Federal University
Sadieva, Leila К.
Ural Federal University
Savchuk, Maria I.
Ural Federal University;
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS
Starnovskaya, Ekaterina S.
Ural Federal University;
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS
Kopchuk, Dmitry S.
Ural Federal University;
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS https://orcid.org/0000-0002-0397-4033
Коvalev, Igor S.
Ural Federal University
Kim, Grigory А.
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS
Chupakhin, Oleg N.
Ural Federal University;
I.Ya. Postovsky Insititute of Organic Synthesis of the Ural Branch of the RAS
benzo[de]naphtho[1,8-gh]quinolones, fluorescence, sensor, explosives
A rational synthetic approach to substituted naphtho[1,8-gh]quinolines using intramolecular cyclization in the presence of potassium in the series of (naphthalen-1-yl)isoquinolines is described. The photophysical properties of the obtained compounds were studied; in particular, fluorescence emission was detected in the range 454 - 482 nm with a quantum yield of up to 54%. We also calculated the HOMO-LUMO energies and optimized molecular structures for the resulting fluorophores. Based on the results of fluorescence titration, the Stern-Volmer constants (up to 21587 M-1) and the detection limits of nitroanalytes (up to 1.4 ppm) were calculated, confirming the possibility of their use as potential chemosensors for the visual detection of nitro-containing explosives.
Ural Federal University
2021-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5568
Chimica Techno Acta; Том 8, № 4 (2021)
eng
(c) 2021 Igor L. Nikonov, Igor A. Khalymbadzha, Leila К. Sadieva, Maria I. Savchuk, Ekaterina S. Starnovskaya, Dmitry S. Kopchuk, Igor S. Коvalev, Grigory А. Kim, Oleg N. Chupakhin
oai:journals.urfu.ru:article/6317
2022-12-22T16:14:24Z
chimtech:L
nmb a2200000Iu 4500
"221122 2022 eng "
2411-1414
dc
Effect of gas-chromatography column regeneration during the CHN/S analysis of copper-chromium disulfide
Troitskaia, Irina B.
Nikolaev Institute of Inorganic Chemistry https://orcid.org/0000-0001-5438-6007
Syrokvashin, Mikhail M.
Nikolaev Institute of Inorganic Chemistry https://orcid.org/0000-0001-5808-0232
Korotaev, Evgeny V.
Nikolaev Institute of Inorganic Chemistry https://orcid.org/0000-0001-7735-0285
Saprykin, Anatoly I.
Nikolaev Institute of Inorganic Chemistry
CHN/S analysis; chromatography column regeneration; copper-chromium disulfide
The effect of gas-chromatography column (GCC) regeneration during the CHN/S analysis of copper-chromium disulfide CuCrS2 (CCDS) samples on the Euro EA 3000 analyzer was identified. The effect results in a perfect straight baseline on the chromatograms of both CuCrS2 and standard samples. The obtained straight baseline causes high-quality peaks separation. In addition, the reported regeneration procedure reduces significantly the GCC regeneration duration that usually takes up to several days.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6317
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Irina B. Troitskaia, Mikhail M. Syrokvashin, Evgeny V. Korotaev, Anatoly I. Saprykin
oai:journals.urfu.ru:article/4808
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201214 2020 eng "
2411-1414
dc
Synthesis and study of complexes of the novel Russian antiviral drug Camphecene with pentacyclic triterpenes of licorice
Khizrieva, S. S.
Southern Federal University, Rostov-on-Don
Vetrova, E. V.
Southern Federal University, Rostov-on-Don
Borisenko, S. N.
Southern Federal University, Rostov-on-Don
Maksimenko, E. V.
Southern Federal University, Rostov-on-Don
Borisenko, N. I.
Southern Federal University, Rostov-on-Don
Camphecene; glycyrrhizic acid; glycyrrhetinic acid; antiviral activity; supramolecular complexes
For the first time, the complexation of pentacyclic triterpenes of licorice (glycyrrhizic acid (GA) and its aglycone, glycyrrhetinic acid (GLA)) with the novel Russian antiviral drug Camphecene (Camph) was investigated. The complexes obtained at different molar ratios were studied using both UV/Vis spectroscopy and mass spectrometry (ESI MS). Formation of the host:guest complexes were registered: GA and GLA molecular complexes (Camph+2GA; Camph+2GLA) with stability constants К = 6.94 106 М-2 and К = 2.89 106 М-2, respectively. The research results demonstrate a considerable potential of ESI MS as a technique for simple and fast detection of formation of the complexes of GA /GLA and the novel drugs.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4808
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 S. S. Khizrieva, E. V. Vetrova, S. N. Borisenko, E. V. Maksimenko, N. I. Borisenko
oai:journals.urfu.ru:article/6701
2023-08-17T03:09:13Z
chimtech:A
nmb a2200000Iu 4500
"230411 2023 eng "
2411-1414
dc
Novel co-doped protonic conductors BaLa<sub>1.9</sub>Sr<sub>0.1</sub>In<sub>1.95</sub>M<sub>0.05</sub>O<sub>6.925</sub> with layered perovskite structure
Bedarkova, Anzhelika
Ural Federal University, Ekaterinburg, Russia https://orcid.org/0000-0003-4346-5644
Tarasova, Nataliia
Ural Federal University, Ekaterinburg, Russia https://orcid.org/0000-0001-7800-0172
Animitsa, Irina
Ural Federal University, Ekaterinburg, Russia https://orcid.org/0000-0002-0757-9241
Abakumova, Ekaterina
Ural Federal University, Ekaterinburg, Russia
Fedorova, Irina
Ural Federal University, Ekaterinburg, Russia
Cheremisina, Polina
Ural Federal University, Ekaterinburg, Russia
Verinkina, Evgenia
Ural Federal University, Ekaterinburg, Russia
layered perovskite; oxygen-ion conductivity; proton conductivity; hydrogen energy; Ruddlesden-Popper structure
Active development of electrochemical devices such as proton-conducting fuel cells and electrolyzers should ensure sustainable environmental development. An electrolyte material of a hydrogen-powered electrochemical device must satisfy a number of requirements, including high proton conductivity. Layered perovskites are a promising class of proton-conducting electrolytes. The cationic co-doping method has been successfully applied to well-known proton conductors with the classical perovskite structure ABO3. However, the data on the application of this method to layered perovskites are limited. In this work, the bilayer perovskites BaLa1.9Sr0.1In1.95M0.05O6.925 (M = Mg2+, Ca2+) were obtained and investigated for the first time. Cationic co-doping increases oxygen-ion and proton conductivity values.
Ural Federal University
2023-07-18 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6701
Chimica Techno Acta; Том 10, № 2 (2023)
eng
(c) 2023 Anzhelika Bedarkova, Nataliia Tarasova, Irina Animitsa, Ekaterina Abakumova, Irina Fedorova, Polina Cheremisina, Evgenia Verinkina
oai:journals.urfu.ru:article/6960
2023-11-24T12:17:56Z
chimtech:A
nmb a2200000Iu 4500
"230727 2023 eng "
2411-1414
dc
Influence of anionic surfactant on stability of nanoparticles in aqueous solutions
Zelentsov, Dmitry O.
Surgut State University https://orcid.org/0009-0007-6153-8380
Petrova, Yuliya Yu.
Surgut State University https://orcid.org/0000-0003-3702-2249
Korobkin, Alexander V.
Surgut State University
Ivanova, Anastasia A.
Skoltech Center for Petroleum Science and Engineering; Skolkovo Institute of Science and Technology https://orcid.org/0000-0003-2323-6297
Cheremisin, Alexey N.
Skolkovo Institute of Science and Technology https://orcid.org/0000-0002-3580-9120
Shanenkov, Ivan I.
Institute of Environmental and Agricultural Biology, Tyumen State University https://orcid.org/0000-0001-7499-5846
Pak, Alexander Ya.
School of Energy and Power Engineering, Tomsk Polytechnic University https://orcid.org/0000-0001-8447-1309
Mateyshina, Yuliya G.
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences
nanoparticles; anionic surfactant; titan oxide; carbon nanoparticles; aggregation
Dispersion and aggregation of nanoparticles in aqueous solutions are important factors for safe and effective application of nanoparticles, for instance, in the oil industry. As conventional oil reserves are depleted, it is necessary to advance chemical enhanced oil recovery (cEOR) techniques to develop unconventional oil reservoirs. Nanoparticles modified by surfactants can be a promising reagent in cEOR. These nanomaterials can reduce interfacial tension and change the wettability of reservoir rock, which leads to an increase in oil recovery. However, the application of nanoparticles is limited by their substantial aggregation in aqueous solutions. The purpose of this work is to select nanoparticles for obtaining stable sols in water in the presence of an anionic surfactant and to optimize the conditions (pH) for further modifying the nanoparticles with the anionic surfactant. Sodium dodecyl sulfate (SDS) is used as an anionic surfactant. The aggregation of oxide and carbon nanoparticles in water and anionic surfactant solutions was studied by laser diffraction, dynamic and electrophoretic light scattering methods. Most of the studied nanoparticles in water form aggregates with bi-, three- and polymodal particle size distributions. TiO2 nanoparticles obtained by plasma dynamic synthesis form the most stable sols in anionic surfactant solutions. The range of 5–7 pH is defined as optimal for their modification with surfactants. The stability of carbon nanoparticles in aqueous solutions increases significantly in the presence of a surfactant. The obtained results form the basis for further research on the modification of marked nanoparticles in surfactant solutions.
Ural Federal University
2023-07-24 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6960
Chimica Techno Acta; Том 10, № 3 (2023)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/6960/16529
(c) 2023 Dmitry O. Zelentsov, Yuliya Yu. Petrova, Alexander V. Korobkin, Anastasia A. Ivanova, Alexey N. Cheremisin, Ivan I. Shanenkov, Alexander Ya. Pak, Yuliya G. Mateyshina
oai:journals.urfu.ru:article/3474
2022-12-15T15:21:56Z
chimtech:A
nmb a2200000Iu 4500
"181220 2018 eng "
2411-1414
dc
Sheelite-related strontium molybdates: synthesis and characterization
Mikhaylovskaya, Zoya Alekseevna
Ural Federal University, Ekaterinburg http://orcid.org/0000-0002-0050-9216
Buyanova, Elena Stanislavovna
Ural Federal University, Ekaterinburg
Petrova, Sofia Aleksandrovna
Institute for Metallurgy, Ural Branch of the Russian Academy of Sciences, Ekaterinburg
Nikitina, Alena Andreevna
Ural Federal University, Ekaterinburg
sheelite; strontium molybdates; dielectric materials
The present research is devoted to the cationic-deficient SrMoO4-based sheelite-related complex oxides. The doping with bismuth to A sublattice and codoping with bismuth and vanadium (to A and B sublattices, respectively) were discussed. The X-Ray powder diffraction and infrared spectroscopy were used to investigate structural characteristics of the complex oxides. In
Sr1-1.5xBixMoO4, a superstructural ordering was observed. Conductivity and dielectric loss of ceramic samples are measured using alternating current.
Ural Federal University
2018-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3474
Chimica Techno Acta; Том 5, № 4 (2018): Специальный Выпуск
eng
(c) 2018 Zoya Alekseevna Mikhaylovskaya, Elena Stanislavovna Buyanova, Sofia Aleksandrovna Petrova, Alena Andreevna Nikitina
oai:journals.urfu.ru:article/5831
2022-12-12T08:52:03Z
chimtech:A
nmb a2200000Iu 4500
"220808 2022 eng "
2411-1414
dc
Testing the antigenotoxicity and anticytotoxicity properties of <i>Prunella Grandiflora</i> L. extract using the example of <i>Drosophila Melanogaster</i>
Magombe, Ngonidzaishe
Ural Federal University
Kostenko, Viktoria V.
Kazan Federal University
Antosyuk, Olga N.
Ural Federal University http://orcid.org/0000-0003-3902-298X
Bolotnik, Elizaveta V.
Botanical Garden of the Ural Branch of the Russian Academy of Sciences http://orcid.org/0000-0001-5774-3866
extract; prunella; etoposide; morphometry; antigenotoxic
Using the Drosophila melanogaster model object, the presence of protective properties in 10% of Prunella grandiflora L. (Lamiaceae) extract was determined in relation to the toxic and cytotoxic effects of the antitumor drug etoposide in two concentrations of 800 and 8000 µg/kg of nutrient medium. The grass P. grandiflora was collected in the flowering phase in Sverdlovsk region (N 56°09'22.0'', E 058°32'19.6'') in 2021. No genotoxic manifestations of the extract were found. Comparative characteristics of wing parameters under the influence of etoposide at a dose of 800 and 8000 mg showed significant differences in linear and two-dimensional parameters of the wing.
Ural Federal University
2022-08-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5831
Chimica Techno Acta; Том 9, № 2S (2022): Supplement
eng
(c) 2022 Ngonidzaishe Magombe, Viktoria V. Kostenko, Olga N. Antosyuk, Elizaveta V. Bolotnik
oai:journals.urfu.ru:article/5186
2021-09-30T14:01:46Z
chimtech:L
nmb a2200000Iu 4500
"210913 2021 eng "
2411-1414
dc
Synthesis and research of polyfunctional silylureas used in electric deposition of tin-indium alloy
Ivanova, K. Yu.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0001-5982-0570
Kuzmin, M. V.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0003-3880-9510
Rogozhina, L. G.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0001-6014-3642
Patianova, A. O.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0002-9785-4058
Semenov, V. L.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0002-9869-6602
Alexandrov, R. I.
Chuvash State University named after I. N. Ulyanov, Cheboksary https://orcid.org/0000-0002-8335-9996
isophorone diisocyanate; hexamethylene diisocyanate; 2,4-toluene diisocyanate; 3-aminopropyltriethoxysilane; polyfunctional silylureas; electrodeposition; indium-tin alloy; copper wire; electrode; solar panels
Polyfunctional silylureas were synthesized by the interaction of 3-aminopropyltriethoxysilane with isocyanates of various structures in an inert aromatic solvent. Commercially available diisocyanates such as isophorone diisocyanate, hexamethylene diisocyanate, 2,4-toluene diisocyanate were used as isocyanates. In this case, freshly distilled toluene was used as a solvent. The structures of the obtained compounds were confirmed by the data of IR and NMR1H spectroscopy. Using the synthesized compounds, formulations of compositions for electrodeposition of a tin-indium alloy on a copper wire were developed. The possibility of using silylureas of various structures as effective surfactants used in the electrodeposition of the tin-indium alloy is shown. The operational characteristics of the obtained wire were investigated, including the wire diameter, coating thickness, tensile strength, electrical resistance, and direct current electrical resistivity.
Ural Federal University
2021-09-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5186
Chimica Techno Acta; Том 8, № 3 (2021)
eng
(c) 2021 K.Yu. Ivanova, M.V. Kuzmin, L.G. Rogozhina, A.O. Patianova, V.L. Semenov, R.I. Alexandrov
oai:journals.urfu.ru:article/3995
2022-12-15T15:19:32Z
chimtech:A
nmb a2200000Iu 4500
"190918 2019 eng "
2411-1414
dc
Synthesis, structure and magnetic properties of Ti doped La<sub>2</sub>MnNiO<sub>6</sub> double perovskite
Dutta, Uma
Department of Chemistry, Visva-Bharati University, Santiniketan-731235, West Bengal
Haque, Ariful
Department of Chemistry, Visva-Bharati University, Santiniketan-731235, West Bengal
Seikh, Md. Motin
Department of Chemistry, Visva-Bharati University, Santiniketan-731235, West Bengal http://vbchem.ac.in/MdMotinSeikh/ http://orcid.org/0000-0001-7546-6655
double perovskite; ferromagnetic; superexchange interaction; magnetic frustration; cationic disorder; magnetic cluster
We report sol-gel synthesis, structural characterization and magnetic properties of La2Mn1-xTixNiO6 (0 ≤ x ≤ 1.0). Ti doping removed the biphasic structure of La2MnNiO6 by suppression of rhombohedral structure and all the Ti containing samples crystallized in monoclinic P21/n symmetry. La2MnNiO6 exhibits multiple magnetic transitions. The high temperature ferromagnetic transition of La2MnNiO6 gradually shifted to lower temperatures with increase in Ti doping. La2TiNiO6 (x = 1.0) does not show any long-range magnetic ordering. The suppression of magnetic transition by Ti doping is ascribed to the destruction of Mn4+—O—Ni2+ superexchange interaction. However, the signature of ferromagnetic phase persists up to 70% Ti doping, indicating the robustness of magnetic ordering in La2MnNiO6. These results suggest that the addition of Ti4+ truncates the ferromagnetic Mn4+—O—Ni2+ superexchange path and it likely promotes ferromagnetic cluster formation. The robustness of ferromagnetic state towards Ti substitution compared to the simple perovskite or spinel structure can be attributed to cationic ordering in double perovskite structure. Both the pure and Ti-doped samples exhibit magnetic frustration at lower temperatures due to partial cationic disordering. The absence of long-range ordering in La2TiNiO6, unlike La2TiCoO6 or Pr2TiCoO6, could be related to cationic disordering.
Ural Federal University
2019-10-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3995
Chimica Techno Acta; Том 6, № 3 (2019)
eng
(c) 2019 Md. Motin Seikh, Uma Dutta, Ariful Haque
oai:journals.urfu.ru:article/5430
2022-06-22T10:04:57Z
chimtech:R
nmb a2200000Iu 4500
"220417 2022 eng "
2411-1414
dc
Quantum chemical study of heterocyclic organic compounds on the corrosion inhibition
Mamand, Dyari Mustafa
University of Raparin
Awla, Awat Hamad
University of Raparin
Kak Anwer, Twana Mohammed
University of Salahaddin
Qadr, Hiwa Mohammad
University of Raparin
DFT; HUMO; LUMO; corrosion inhibition; 1, 3, 4-thiadiazole
Corrosion damages all materials, necessitating replacement and inspection related expenses. Thus, the demand has increased for new corrosion inhibitor materials. The ratios of corrosion inhibition of materials are different, but organic compounds have high efficiency in aqueous corrosion inhibition for various alloys and metals. This efficiency can increase in the presence of O, N and S. The molecule provides great inhibition with the presence of both S and N atoms in the same compound. This paper investigates the 1, 3, 4-thiadiazole molecule and electronic structure of several organic compounds such as R1 and R2 which consist of different substituent groups. They were united to the ring of 1, 3, 4-thiadiazole to provide nine different derivatives. Quantum computations (density functional theory, DFT) at 6-311G++ (d, p) basis set and Becke’s three parameters hybrid (B3LYP) level were performed using Gaussian program. The purpose of this study is to determine the chemical behaviour of several heterocyclic organic compounds and to understand the process of the corrosion inhibition.
Ural Federal University
2022-06-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5430
Chimica Techno Acta; Том 9, № 2 (2022)
eng
(c) 2021 Dyari Mustafa Mamand, Awat Hamad Awla, Twana Mohammed Kak Anwer, Hiwa Mohammad Qadr
oai:journals.urfu.ru:article/4769
2022-03-25T16:11:14Z
chimtech:A
nmb a2200000Iu 4500
"210304 2021 eng "
2411-1414
dc
Investigation of Borosilicate Glasses with Simulated HLW Components and Determination of Their Chemical Durability
Shaydullin, S. M.
Seversk Technological Institute – Branch of NRNU MEPhI, Seversk; FSUE Mayak Production Association, Ozyorsk
Belanova, E. A.
FSUE Mayak Production Association, Ozyorsk
Kozlov, P. V.
FSUE Mayak Production Association, Ozyorsk; Ozyorsk Technological Institute – Branch of NRNU MEPhI, Ozyorsk
Remizov, M. B.
FSUE Mayak Production Association, Ozyorsk
Dvoryanchikova, E. M.
FSUE Mayak Production Association, Ozyorsk
borosilicate glass; vitrification; high-level waste; chemical durability; vitrification melter
The paper discusses the current status of the HLW vitrification technology applied at the radiochemical plant of the Mayak PA. Conceptual and technical solutions proposed to develop the technology of vitrification of various types of liquid HLW at the Mayak PA are presented. Compositions of borosilicate glasses with HLW components are described, temperatures of their melting and easy pouring are determined. Chemical durability parameters obtained for the borosilicate glasses are provided.
Ural Federal University
2021-04-16 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4769
Chimica Techno Acta; Том 8, № 1 (2021): PCEE-2020 Special Issue
eng
(c) 2020 Shaydullin S.M., Belanova E.A., Kozlov P.V., Remizov M.B., Dvoryanchikova E.M.
oai:journals.urfu.ru:article/715
2022-12-15T15:05:00Z
chimtech:A
nmb a2200000Iu 4500
"140930 2014 eng "
2411-1414
dc
Synthesis of 2-(5-arylidene-4-oxo-3-arylthiazolydine-2)-N-phenylethanthiamides derivatives from malondithioamides
Obydennov, K. L.
Y-Synthesis, Ekaterinburg
Golovko, N. A.
Y-Synthesis, Ekaterinburg
Morzherin, Yu. Yu.
Y-Synthesis, Ekaterinburg
thiomalonamides; chromophores; Oxidation reaction; knoevenagel condensation; thiazole
В данной работе были синтезированы производные 2-(5-арилиден-4-оксо-3-арилтиазолидин-2-илиден)-N-фенилэтантиоамида из N,N`-дизамещенных малондитиоамидов в две стадии: последовательное проведение реакции Ганча и конденсации Кневенагеля.
Ural Federal University
2014-09-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/715
Chimica Techno Acta; Том 1, № 2 (2014)
rus
(c) 2014 K. L. Obydennov, N. A. Golovko, Yu. Yu. Morzherin
oai:journals.urfu.ru:article/7229
2024-01-12T19:33:09Z
chimtech:L
nmb a2200000Iu 4500
"231231 2023 eng "
2411-1414
dc
Novel direct synthetic route of 2D Prussian Blue analogue, nanocrystalline CuHCF, as highly effective cathode materials for Zn-ion supercapacitors
Kaneva, Maria V.
Ioffe Institute http://orcid.org/0000-0003-2816-7059
Bachina, Anastasia K.
Ioffe Institute http://orcid.org/0000-0001-7015-1435
Lobinsky, Artem A.
Ioffe Institute http://orcid.org/0000-0001-5930-2087
Prussian blue analogue; transition metals; 2D crystals; cathode materials; supercapacitors
Prussian blue analogues (PBAs) with 2D morphology of nanocrystals have attracted much attention for aqueous electrolyte-based energy storage devices. In this study, we synthesized a 2D Prussian blue analogue, nanocrystals of copper hexacyanoferrate (CuHCF), via a facile stepwise route involving a modified copper substrate of Cu(OH)2 nanorods that was used for the formation of two-dimensional CuHCF crystals. These materials were characterized by powder X-ray diffraction, energy dispersive X-ray microanalysis, X-ray photoelectron spectroscopy and scanning electron microscopy. The cathode based on 2D CuHCF exhibits high specific capacity (240 F/g (63.9 mAh/g) at 0.1 A/g) with excellent cycling stability (98.5% retention after 1000 charge-discharge cycles) in 3 M ZnSO4 electrolyte. The flat two-dimensional morphology of CuHCF provides sufficient ion diffusion channels and the numerous electroactive interfaces for intercalation charge storage.
Ural Federal University
2024-01-10 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7229
Chimica Techno Acta; Том 10, № 4 (2023)
eng
(c) 2023 Maria V. Kaneva, Anastacia K. Bachina, Artem A. Lobinsky
oai:journals.urfu.ru:article/6958
2024-01-12T19:33:09Z
chimtech:A
nmb a2200000Iu 4500
"231010 2023 eng "
2411-1414
dc
The impact of dimethylformamide on the synthesis of graphene quantum dots derived from graphene oxide
Truong, Khuong T.
Ho Chi Minh City University of Technology (HCMUT); Vietnam National University Ho Chi Minh City https://orcid.org/0000-0001-5129-3710
Pham, Thach H.
Ho Chi Minh City University of Technology (HCMUT); Vietnam National University Ho Chi Minh City
Tran, Khai V.
Ho Chi Minh City University of Technology (HCMUT); Vietnam National University Ho Chi Minh City https://orcid.org/0000-0003-0379-227X
graphene quantum dots; graphene oxide; solvothermal; photoluminescence; dimethylformamide
Graphene quantum dots (GQDs) have garnered immense interest in recent years due to their unique optical, electrical, and chemical properties, making them promising candidates for various applications in optoelectronics, bioimaging, and sensing. However, enhancing the control over the size, surface chemistry, and optical properties of GQDs remains a significant challenge. In this study, a novel recipe was proposed to successfully synthesize various GQDs via a typical solvothermal process, which has proven to be a versatile and scalable approach. In addition to the main ingredient – graphene oxide suspension, dimethylformamide (DMF) and hydrogen peroxide serving as a cutting agent were added to the reaction mixture. This synthesis method was found to be more promising than the reference one in which DMF was replaced by double distilled water. Through systematic experimentation, we demonstrated that the addition of DMF enables the successful GQD production over a wider range of reaction times; hence, the UV absorption band and photoluminescence properties of GQDs can be better adjusted. The dependence of photoluminescence on the excitation wavelength was observed in the as-prepared materials as they were excited with a range of wavelengths from 360 to 480 nm. The obtained insights not only advance our understanding of GQD synthesis but also open up avenues for tailoring their properties for specific applications.
Ural Federal University
2024-01-10 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6958
Chimica Techno Acta; Том 10, № 4 (2023)
eng
(c) 2023 Khuong T. Truong, Thach H. Pham, Khai V. Tran
oai:journals.urfu.ru:article/1688
2022-12-15T15:11:00Z
chimtech:R
nmb a2200000Iu 4500
"151225 2015 eng "
2411-1414
dc
Vladimir Mikhailovich Zhukovsky
Editors, Chimica Techno Acta
Ural federal university, Ekaterinburg
Этот выпуск журнала, в который вошли статьи известных специалистов в области химии твердого тела из Екатеринбурга, Новосибирска, Улан-Удэ и Санкт-Петербурга, мы посвящаем памяти Владимира Михайловича Жуковского, который остается примером для нас в науке и жизни.
Ural Federal University
2015-12-25 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1688
Chimica Techno Acta; Том 2, № 4 (2015)
rus
(c) 2015 Chimica Techno Acta Editors
oai:journals.urfu.ru:article/1127
2022-12-15T15:10:51Z
chimtech:A
nmb a2200000Iu 4500
"150527 2015 eng "
2411-1414
dc
Thermosensitization of nanostructured PbSe films
Bakanov, V. M.
Ural Institute of State Fire Service of EMERCOM of Russia, Ekaterinburg
Maskaeva, L. N.
Ural Institute of State Fire Service of EMERCOM of Russia, Ekaterinburg
Markov, V. F.
Ural Institute of State Fire Service of EMERCOM of Russia, Ekaterinburg
conditions of thermal sensitization; lead selenide; IR radiation
Определены режимы и условия термосенсибилизации в температурном диапазоне 648-698 K пленок селенида свинца, осажденных из этилендиамин-ацетатной системы. Показано влияние термообработки на морфологию и фоточувствительные свойства химически осажденных пленок PbSe. Сделан вывод о том, что гидрохимический синтез обеспечивает получение наноструктурированных высокочувствительных к ИК-излучению слоев селенида свинца на уровне лучших зарубежных аналогов.
Ural Federal University
2015-05-27 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1127
Chimica Techno Acta; Том 2, № 2 (2015)
rus
(c) 2015 V. M. Bakanov, L. N. Maskaeva, V. F. Markov
oai:journals.urfu.ru:article/5717
2022-12-12T08:52:03Z
chimtech:A
nmb a2200000Iu 4500
"220614 2022 eng "
2411-1414
dc
Synthesis of polycalciumphenylsiloxane and composites based on the skeleton of a sea urchin with the resulting polymer
Shapkin, Nikolai Р.
Far Eastern Federal University http://orcid.org/0000-0002-4287-8917
Khalchenko, Irina G.
Far Eastern Federal University http://orcid.org/0000-0002-5541-2200
Kim, Kvan H.
Far Eastern Federal University
Papynov, Evgeniy K.
Far Eastern Federal University http://orcid.org/0000-0002-1185-7718
Fedorets, Alexander N.
Far Eastern Federal University
Maslova, Natalia V.
Far Eastern Federal University
Balanov, Michael I.
Far Eastern Federal University
polyphenylsiloxane; calcium acetylacetonate; sea urchin skeleton; mechanochemical activation
In this work, we obtained polycalciumphenylsiloxane (PCPS) by the interaction of calcium bis (acetylacetonate) with polyphenylsiloxane. The first method consisted in boiling the starting reagents in toluene for several hours; the second was as follows: the mixture of the starting reagents was preliminarily treated mechanically in a ball mill, followed by boiling in toluene for several hours. Two fractions, soluble and insoluble, were isolated in both syntheses. They were investigated using IR, NMR spectroscopy, thermogravimetric analysis, and gel permeation chromatography. It was shown that the insoluble fraction is a mixture of calcium acetylacetonate and polyphenylsiloxane with a small calcium ion content. The soluble fraction is polycalciumphenylsiloxane. The yield of the soluble fraction is higher in the second synthesis method. The polymers obtained in the first and second synthesis methods are similar in composition and structure, which was confirmed by physicochemical methods. Next, the skeleton of the sea urchin Strongylocentrotus intermedius was treated with a soluble fraction in toluene. In this case, a composite was obtained, which was treated with 2–3% hydrochloric acid and then calcined at a temperature of 600 °C. At each stage, the composition of the composites was investigated using elemental analysis and IR spectroscopy. The morphology was investigated using scanning electron microscopy.
Ural Federal University
2022-08-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5717
Chimica Techno Acta; Том 9, № 2S (2022): Supplement
eng
(c) 2022 Nikolai P. Shapkin, Irina G. Khalchenko, Kvan H. Kim, Evgeniy K. Papynov, Alexander N. Fedorets, Natalia V. Maslova, Michael I. Balanov
oai:journals.urfu.ru:article/1095
2022-12-15T15:10:46Z
chimtech:A
nmb a2200000Iu 4500
"150329 2015 eng "
2411-1414
dc
Structure and transport properties of composite materials on a basis of Ce<sub>0.8</sub>Nd<sub>0.2</sub>O<sub>2-δ</sub> and BaCe<sub>0.8</sub>Nd<sub>0.2</sub>O<sub>3-δ</sub>
Lyagaeva, Ju. G.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
Medvedev, D. A.
Institute of High-Temperature Electrochemistry UB RAS, Ekaterinburg
ceramics; relative density; porosity; grain size; oxygen partial pressure
В настоящей работе проведен синтез материалов путем одностадийного цитрат-нитратного метода. С привлечением данных ТГ-ДСК анализа установлены оптимальные температуры синтеза порошков. Фазовые особенности синтезированных материалов изучены РФА с привлечением метода Ритвелда. Установлено влияние содержания перовскитной фазы в системе (1-x)Ce0.8Nd0.2O2-δ-xBaCe0.8Nd0.2O3-δ (х=0, 0.25, 0.5, 0.75 и 1) на размеры кристаллитов и частиц порошка. Исследованы керамические свойства (относительная плотность, пористость, размеры зерен) образцов, спеченных при 1500 °С. Исследование электропроводности материалов в широких интервалах температур (550–900 °С) и парциальных давлений кислорода (10-23≤рО2/атм≤0,21) позволило выявить особенности электропереноса в системе (1-x)Ce0.8Nd0.2O2-δ-xBaCe0.8Nd0.2O3-δ.
Ural Federal University
2015-03-29 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1095
Chimica Techno Acta; Том 2, № 1 (2015)
rus
(c) 2015 Ju. G. Lyagaeva, D. A. Medvedev
oai:journals.urfu.ru:article/2070
2022-12-15T15:09:13Z
chimtech:A
nmb a2200000Iu 4500
"161230 2016 eng "
2411-1414
dc
The study of the curing of the polyurethane coating by method of IR spectroscopy
Korshunova, N. A.
"STC-Immuno Analisys" Ltd., Ekaterinburg
Tukhvatullina, R. F.
"STC-Immuno Analisys" Ltd., Ekaterinburg
El'tsov, O. S.
"STC-Immuno Analisys" Ltd., Ekaterinburg
polyurethane; polyol; isocyanate; chemical curing; IR spectroscopy
Приведены результаты исследования процесса отверждения полиуретановых композиций с участием двух различных катализаторов методом ИК-спектроскопии. Определены временные зависимости отверждения полиуретанового покрытия от концентраций катализаторов, по которым выбран наиболее эффективный катализатор.
Ural Federal University
2016-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2070
Chimica Techno Acta; Том 3, № 4 (2016)
rus
(c) 2016 N. A. Korshunova, R. F. Tukhvatullina, O. S. El'tsov
oai:journals.urfu.ru:article/1649
2022-12-15T15:10:18Z
chimtech:A
nmb a2200000Iu 4500
"160315 2016 eng "
2411-1414
dc
The mathematical description of the electrosynthesis of composites of oxy-hydroxycompounds cobalt with polypyrrole overooxidazed
Tkach, V. V.
Chernovitsky national University, Ukraine
de Oliveira, C. S.
Federal University of state of Mato Grosso do Sul,
Brazil
Maia, J.
Federal University of state of Mato Grosso do Sul,
Brazil
Soares, B. G.
Federalny the state University of Rio de Janeiro,
Brazil
Ojani, R.
University of Mazandaran, Islamic Republic of Iran
Yagodynets, P. I.
Chernovitsky national University, Ukraine
cobalt; polypyrrole; pereoxidation; self-oscillations; stable steady state
Электросинтез композита переокисленного полипиррола с окси-гидроксисоединениями кобальта в сильнокислой среде был описан математически, с использованием линейной теории устойчивости и бифуркационного анализа. Были описаны условия устойчивости стационарного состояния, а также автоколебательной и монотонной неустойчивости. Поведение системы было сравнено с поведением других систем с переокислением, электрополимеризацией гетероциклических соединений, а также электросинтезом окси-гидроксисоединений кобальта.
Ural Federal University
2016-03-15 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1649
Chimica Techno Acta; Том 3, № 1 (2016)
rus
(c) 2016 V. V. Tkach, S. C. de Oliveira, J. Maia, B. G. Soares, R. Ojani, P. I. Yagodynets
oai:journals.urfu.ru:article/2132
2022-12-15T15:22:51Z
chimtech:A
nmb a2200000Iu 4500
"170530 2017 eng "
2411-1414
dc
Anodic behaviour of aluminium and its alloys in sodium chlorate solutions
Nechaev, A. V.
Ural federal university, Ekaterinburg
Nechaev, A. A.
Ural federal university, Ekaterinburg
Timina, A. A.
Ural federal university, Ekaterinburg
anode potential; aluminium alloys; anodic polarization curves; sodium chlorate
Методом снятия анодных поляризационных кривых на вращающемся дисковом электроде изучено влияние хлорат-ионов на анодное растворение алюминия и его сплавов с магнием при высоких плотностях тока в условиях интенсивного перемешивания электролита. Показано, что при сравнительно низких значениях анодного потенциала процесс лимитируется собственно электрохимической реакцией, а при дальнейшем сдвиге потенциала и отводом продуктов реакции от поверхности анода. Эффективное сглаживание микрорельефа поверхности алюминиевых сплавов в растворах хлоратов связано с периодическим образованием и разрушением на обрабатываемой поверхности специфической оксидной пленки и подавлением вследствие этого электрохимической гетерогенности структурных составляющих сплавов.
Ural Federal University
2017-04-14 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2132
Chimica Techno Acta; Том 4, № 1 (2017)
rus
https://journals.urfu.ru/index.php/chimtech/article/download/2132/4618
https://journals.urfu.ru/index.php/chimtech/article/download/2132/4619
https://journals.urfu.ru/index.php/chimtech/article/download/2132/4620
(c) 2017 A. V. Nechaev, A. A. Nechaev, A. A. Timina
oai:journals.urfu.ru:article/5531
2021-12-28T02:27:04Z
chimtech:L
nmb a2200000Iu 4500
"211215 2021 eng "
2411-1414
dc
Obtaining cyclopentanone in the presence of metal oxides
Tsvetkova, I. V.
Togliatti State University, Togliatti https://orcid.org/0000-0002-5945-2015
Golovanov, A. A.
Togliatti State University, Togliatti
Kondrateva, A. A.
Togliatti State University, Togliatti
Chirkunova, N. V.
Togliatti State University, Togliatti
adipic acid, pyrolysis, cyclopentanone, cyclopentene, catalysts, metal oxides
The possibility of obtaining cyclopentanone by pyrolysis of calcium adipate at different temperatures was considered. The pyrolysis proceeded with the formation of cyclopentanone and cyclopentene. The use of metal salts and metal oxide catalysts for the dehydrogenation of lower alkanes makes it possible to increase the yields of the target products. The best results were achieved in the presence of a «K-16u» catalyst.
Ural Federal University
2021-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5531
Chimica Techno Acta; Том 8, № 4 (2021)
eng
(c) 2021 I.V. Tsvetkova, A.A. Golovanov, A.A. Kondrateva, N.V. Chirkunova
oai:journals.urfu.ru:article/6270
2022-12-22T16:14:24Z
chimtech:A
nmb a2200000Iu 4500
"221110 2022 eng "
2411-1414
dc
Hydrothermal synthesis and sorption performance to Cs(I) and Sr(II) of zirconia-analcime composites derived from coal fly ash cenospheres
Vereshchagina, Tatiana A.
Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences” https://orcid.org/0000-0003-4538-8902
Kutikhina, Ekaterina A.
Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences” https://orcid.org/0000-0002-8730-129X
Buyko, Olga V.
Siberian Federal University https://orcid.org/0000-0003-4671-4909
Anshits, Alexander G.
Federal Research Center “Krasnoyarsk Science Center of Siberian Branch of the Russian Academy of Sciences”; Siberian Federal University https://orcid.org/0000-0002-5259-0319
cenospheres; hydrothermal synthesis; zirconia-analcime composite; Cs(I) and Sr(II) sorption; radioactive waste
The paper is concerned with (i) the hydrothermal synthesis of hydrous zirconium dioxide (HZD) bearing analcime (HZD-ANA, zirconia-analcime) and (ii) its sorption properties with respect to Cs+ and Sr2+. The HZD-ANA particles were synthesized from coal fly ash cenospheres composed of aluminosilicate glass with (SiO2/Al2O3)wt.=3.1 and characterized by PXRD, SEM-EDS, STA, and low-temperature N2 adsorption. The non-radioactive simulant solutions of different acidity (pH=2–10) and Cs+/Sr2+ content (0.5–50.0 mg/L) were used in the work. The effect of synthesis conditions on the HZD-ANA particle size, zirconia content and localization as well as the sorption behavior with respect to Cs+ and Sr2+ (capacity, KD) were clarified. It was found that the small-sized HZD-ANA composites surpasses the Zr free analcime and large-sized HZD-ANA material in the Cs+ and Sr2+ sorption parameters (KD ~104–106 mL/g). The conditions to synthesize the zirconia-analcime composite of the highly enhanced sorption ability with respect to Sr2+ (KD ~106 mL/g) were determined. The high-temperature solid-phase re-crystallization of Cs+/Sr2+-exchanged HZD-ANA composites was shown to occur at 1000 °C resulting in a polyphase system based on nepheline, tetragonal ZrO2, and glass phase.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6270
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Tatiana A. Vereshchagina, Ekaterina A. Kutikhina, Olga V. Buyko, Alexander G. Anshits
oai:journals.urfu.ru:article/6378
2023-08-17T03:09:13Z
chimtech:L
nmb a2200000Iu 4500
"230329 2023 eng "
2411-1414
dc
Electrochemical creatinine determination with metal-organic framework catalyst based on copper and acetylenedicarboxylic acid
Okhokhonin, Andrei V.
Ural Federal University https://orcid.org/0000-0003-2922-7623
Ibatullina, Alsu A.
Ural Federal University https://orcid.org/0009-0003-2562-9606
Izmozherova, Yulia V.
Ural Federal University https://orcid.org/0009-0008-3601-5016
Stepanova, Marina I.
Ural Federal University https://orcid.org/0000-0002-1779-1756
Matern, Anatoliy I.
Ural Federal University https://orcid.org/0009-0000-4645-0961
Kozitsina, Alisa N.
Ural Federal University https://orcid.org/0000-0002-0263-2111
metal-organic framework; creatinine; voltammetry; Electrochemical catalyst; enzymeless determination
Fast and accurate determination of creatinine is critical in kidney function diagnostics. This paper discusses the usage of the metal-organic framework based on copper(II) and acetylenedicarboxylic acid (CuADCA) as a catalyst of electrochemical oxidation of creatinine, glucose and urea. CuADCA was synthesized by deprotonation with triethylamine for the first time. Successful synthesis was confirmed by FTIR and EDS. The material was characterized by SEM, EIS, and CV. CuADCA forms laminated-like flakes with diameter from 1 µm to 20 µm, which is consistent with the polymer-like structure. CV and EIS analyses showed that CuADCA immobilized on GCE acts as a catalyst in electrooxidation reaction of glucose, urea, and creatinine. The sensitivity of creatinine detection, 1057±99 µA/mM, was higher than the detection sensitivity of glucose and urea by more than 100 times with the limit of detection of 2 µM, so CuADCA is a promising material for further development of enzymeless sensors for creatinine.
Ural Federal University
2023-07-18 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6378
Chimica Techno Acta; Том 10, № 2 (2023)
eng
(c) 2023 Andrei V. Okhokhonin, Alsu A. Ibatullina, Yulia V. Izmozherova, Marina I. Stepanova, Anatoliy I. Matern, Alisa N. Kozitsina
oai:journals.urfu.ru:article/3464
2022-12-15T15:21:38Z
chimtech:A
nmb a2200000Iu 4500
"181028 2018 eng "
2411-1414
dc
Hopping conductivity in a system with ZnS crystal lattice by non-constant force field molecular dynamics
Raskovalov, Anton A.
Institute of High-Temperature Electrochemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg http://orcid.org/0000-0002-6634-4135
molecular dynamics; non-constant force field; polaron hopping; ZnS lattice
In the paper non-constant force field molecular dynamics was used to study conductivity behavior on ZnS crystal lattice. The considered conductivity provided by electron hopping between localization centers placed randomly according to ZnS geometry. It was shown that the conductivity behavior depends on the maximal hopping distance. For the small distances the conductivity passes through the maximum around equimolar concentrations of electron donors and acceptors. Increasing in the maximal hopping distance leads to increasing in conductivity values and change shape of its concentration dependence.
Ural Federal University
2018-10-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3464
Chimica Techno Acta; Том 5, № 3 (2018)
eng
(c) 2018 Anton Alexandrovich Raskovalov
oai:journals.urfu.ru:article/6010
2022-08-29T06:13:28Z
chimtech:L
nmb a2200000Iu 4500
"220803 2022 eng "
2411-1414
dc
Glucose-assisted polyol synthesis of silver nanoplates and nanoprisms in the presence of oxyethylated carboxylic acid
Titkov, Alexander A.
Institute of Solid State Chemistry and Mechanochemistry SB RAS https://orcid.org/0000-0003-0835-9985
Borisenko, Tatiana A.
Institute of Solid State Chemistry and Mechanochemistry SB RAS
Logutenko, Olga A.
Institute of Solid State Chemistry and Mechanochemistry SB RAS https://orcid.org/0000-0003-1523-5446
silver; nanoprisms; ethylene glycol; glucose; reduction
This work reports a simple route to synthesizing silver nanoplates and nanoprisms through a polyol approach in the presence of oxyethylated carboxylic acid and glucose. The resulting particles were characterized by electron microscopy and X-ray diffraction (XRD). The introduction of glucose and NaOH into the system substantially increases the yield of nanoplates and reduces their thickness. The optimized reaction conditions can be used to produce, in a one-pot synthesis, silver nanoplates and nanoprisms which may have applications as metallic fillers in ink and paste formulations for 2D and 3D printing to fabricate functional components and devices.
Ural Federal University
2022-09-01 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6010
Chimica Techno Acta; Том 9, № 3 (2022)
eng
(c) 2022 Alexander A. Titkov, Tatiana A. Borisenko, Olga A. Logutenko
oai:journals.urfu.ru:article/5225
2021-08-25T07:12:26Z
chimtech:COR
nmb a2200000Iu 4500
"210704 2021 eng "
2411-1414
dc
Corrigendum to Morphological and structural features of the Cd<sub>x</sub>Pb<sub>1−x</sub>S films obtained by CBD from ethylenediamine-citrate bath
Kutyavina, A. D.
Ural Federal University, Yekaterinburg http://orcid.org/0000-0002-1489-1137
Maskaeva, L. N.
Ural Federal University, Yekaterinburg; Ural Institute of the State Fire Service of the EMERCOM of Russia, Yekaterinburg
Voronin, V. I.
M.N. Miheev Institute of Metal Physics, Yekaterinburg
Anokhina, I. A.
Ural Federal University, Yekaterinburg; Institute of High Temperature Electrochemistry, Yekaterinburg
Markov, V. F.
Ural Federal University, Yekaterinburg; Ural Institute of the State Fire Service of the EMERCOM of Russia, Yekaterinburg
The original article, “Kutyavina AD, Maskaeva LN, Voronin VI, Anokhina IA, Markov VF. Morphological and structural features of the CdxPb1−xS films obtained by CBD from ethylenediamine-citrate bath. Chimica Techno Acta. 2021;8(2):20218210”, is available at: https://doi.org/10.15826/chimtech.2021.8.2.10
Ural Federal University
2021-07-04 00:00:00
Corrigendum
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5225
Chimica Techno Acta; Том 8, № 2 (2021)
eng
(c) 2021 A. D. Kutyavina, L. N. Maskaeva, V. I. Voronin, I. A. Anokhina, V. F. Markov
oai:journals.urfu.ru:article/2640
2022-12-15T15:23:36Z
chimtech:A
nmb a2200000Iu 4500
"171215 2017 eng "
2411-1414
dc
Preparation and characterization of Bi<sub>4–x</sub>Pr<sub>x</sub>Ti<sub>3</sub>O<sub>12</sub> solid solutions
Klyndyuk, A. I.
Belarus State Technological University, Minsk http://orcid.org/0000-0003-0566-4386
Chizhova, E. A.
Belarus State Technological University, Minsk
Poznyak, A. I.
Belarus State Technological University, Minsk
layered bismuth titanates; dielectric constant; dielectric losses; electrical conductivity; thermo-EMF; thermal expansion
The Bi4–xPrxTi3O12 (BPT) solid solutions (x = 0.05, 0.10, 0.15) with small praseodymium content were prepared by solid-state method. Thermal, electric, and dielectric properties of BPT were studied. It was revealed that BPT titanates crystalize in аn orthorhombic structure and exhibit p-type semiconductivity. Dielectric constant of BPT increased, Curie temperature (TC), electrical conductivity and dielectric losses decreased, but lattice parameters and thermo-EMF coefficient remained practically unchanged with the increase of praseodymium content in layered Bi4–xPrxTi3O12. It was determined that activation energy of direct current (DC) electrical conductivity and linear thermal expansion coefficient (LTEC) of BPT changes at ferroelectric (FE) → paraelectric (PE) phase transition. The activation energy and LTEC changed below and above TC from 1.08–1.56 eV to 0.45–0.86 eV and from (9.10–10.80)×10–6 K–1 to (13.12-14.61)×10–6 K–1, respectively. The AC electrical conductivity studies of BPT illustrated short-range order with ionic translations assisted by small-polaron hopping.
Ural Federal University
2017-12-25 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2640
Chimica Techno Acta; Том 4, № 4 (2017)
eng
(c) 2017 A. I. Klyndyuk, E. A. Chizhova, A. I. Poznyak
oai:journals.urfu.ru:article/4962
2022-06-22T10:04:57Z
chimtech:A
nmb a2200000Iu 4500
"220323 2022 eng "
2411-1414
dc
<i>In situ</i> synthesis, structural chemistry and vibrational spectroscopy of Zn-doped Ca<sub>5</sub>Mg<sub>4</sub>(VO<sub>4</sub>)<sub>6</sub>
Tolkacheva, Anna S.
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0002-7546-7807
Shkerin, Sergey N.
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0003-4064-0670
Petrova, Sofya A.
Institute of Metallurgy, UB RAS http://orcid.org/0000-0002-9796-5794
Fedorova, Olga M.
Institute of Metallurgy, UB RAS https://orcid.org/0000-0002-0692-770X
Titova, Svetlana G.
Institute of Metallurgy, UB RAS https://orcid.org/0000-0003-2891-3453
Leonidov, Ivan I.
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0002-6635-4747
crystal structure, vibrational spectroscopy, X-ray diffraction, ceramics, differential scanning calorimetry, pyrovanadate, garnet
The phase formation of the solid solution Ca5Mg4–xZnx(VO4)6 (0≤x≤4) was studied in situ using differential scanning calorimetry and high-temperature X-Ray powder diffraction (XRPD). XRPD analysis shows the appearance of unavoidable secondary pyrovanadate phases using conventional synthesis methods. The local structure of the solid solution was verified by vibrational spectroscopy. The analysis of the infrared and Raman spectroscopy data allows establishing the main features between vanadate garnets and their isostructural analogs among natural silicates.
Ural Federal University
2022-06-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4962
Chimica Techno Acta; Том 9, № 2 (2022)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/4962/13045
(c) 2021 Anna S. Tolkacheva, Sergey N. Shkerin, Sofya A. Petrova, Olga M. Fedorova, Svetlana G. Titova, Ivan I. Leonidov
oai:journals.urfu.ru:article/4866
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201228 2020 eng "
2411-1414
dc
Relevance of application of irradiated starter cultures to production of fermented milk products
Zhuravleva, D. A.
Ural Federal University, Yekaterinburg
Kazakov, A. V.
Ural State University of Economics, Yekaterinburg
Selezneva, I. S.
Ural Federal University, Yekaterinburg
Baranova, A. A.
Ural Federal University, Yekaterinburg
fermented milk products; probiotic microorganisms; secondary metabolites; ionizing radiation
Nowadays yogurt, fermented milk products, enriched with biologically active substances, acquire increasingly important significance in people's diets. The traditional method for producing fermented milk products and yogurt is to ferment the milk using starter cultures. The purpose of this research was to figure out if it is possible to use suspensions of probiotic microbial cultures irradiated with ionizing radiation to produce yoghurt products. Liquid live suspensions of bifidobacteria and lactobacilli, as well as a mixture of bifidobacteria, lactobacilli, propionibacteria and lactic acid streptococci were taken as a research model. The goal was achieved by receiving the yoghurt products enriched with active secondary metabolites due to using the suspensions of lysed cells of different microorganisms. We studied physico-chemical and organoleptic properties of the received products after 1, 7 and 14 days of storage.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4866
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 D. A. Zhuravleva, A. V. Kazakov, I. S. Selezneva, A. A. Baranova
oai:journals.urfu.ru:article/676
2022-12-15T15:05:00Z
chimtech:A
nmb a2200000Iu 4500
"140930 2014 eng "
2411-1414
dc
Synthesis and research of cis-trans isomerism for 5-(4-methoxybenzoyl)-6-(4-metoxyphenyl)-6,7-dihydro-5<i>H</i>-[1,2,3]triazolo[5,1-<i>b</i>][1,3,4]thiadiazine
Kalinina, T. A.
Y-Synthesis, Ekaterinburg
Bystrykh, O. A.
Y-Synthesis, Ekaterinburg
Shakhmina, J. S.
Y-Synthesis, Ekaterinburg
Glukhareva, T. V.
Y-Synthesis, Ekaterinburg
Fan, Zhi-Jin
Nankai University, Tianjin
Morzherin, Yu. Yu.
Y-Synthesis, Ekaterinburg
1,2,3-thiadiazole; Dimroth rearrangement; thiadiazine; isomerism; effect of temperature; solvent
Показано, что при взаимодействии 1,2,3-тиадиазолилгидразона 4-метоксибензальдегида с α-бром-4-метоксиацетофеноном в присутствии триэтиламина образуется 5-(4-метоксибензоил)-6-(4-метоксифенил)-6,7-дигидро-5H-[1,2,3]триазоло[5,1-b][1,3,4]тиадиазин в виде смеси цис- и транс- стереоизомеров. Исследовано влияние на соотношение изомеров природы растворителя и температуры. Выявлено увеличение относительного количества транс-стереоизомера с увеличением полярности растворителя.
Ural Federal University
2014-09-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/676
Chimica Techno Acta; Том 1, № 2 (2014)
rus
(c) 2014 T. A. Kalinina, O. A. Bystrykh, J. S. Shakhmina, T. V. Glukhareva, Zhi-Jin Fan, Yu. Yu. Morzherin
oai:journals.urfu.ru:article/7210
2024-02-19T05:21:23Z
chimtech:A
nmb a2200000Iu 4500
"231208 2023 eng "
2411-1414
dc
Chemical stability aspects of BaCe<sub>0.7–<i>x</i></sub>Fe<sub><i>x</i></sub>Zr<sub>0.2</sub>Y<sub>0.1</sub>O<sub>3–δ</sub> mixed ionic-electronic conductors as promising electrodes for protonic ceramic fuel cells
Tarutina, Liana
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0003-1079-5292
Starostina, Inna
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0002-9793-1375
Vdovin, Gennady
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0001-6653-5065
Pershina, Svetlana
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0002-0345-4978
Vovkotrub, Emma
Institute of High-Temperature Electrochemistry, UB RAS https://orcid.org/0000-0002-9610-2129
Murashkina, Anna
Saint Petersburg State University https://orcid.org/0000-0003-1168-0411
mixed ion-electron conductors; protonic ceramic fuel cells; chemical stability; barium ferrite; chemical interaction; crystal structure
Mixed ion-electron conductors (MIECs) are promising materials for air electrodes for protonic ceramic fuel cells (PCFCs) or oxygen permeation membranes. In this work, various aspects of the chemical stability of Co-free MIEC materials, BaCe0.7–xFexZr0.2Y0.1O3–δ, were studied, including their interaction with another functional material (BaCe0.5Zr0.3Y0.1Yb0.1O3–δ-based proton-conducting electrolyte) and gas components (H2O, CO2, and H2). Chemical compatibility studies indicate no visible chemical interaction between the electrode and electrolyte materials even at 1200 °C, which is significantly higher than the operating temperatures (600–800 °C) of PCFCs. The treatments of BaCe0.7–xFexZr0.2Y0.1O3–δ in different atmospheres at 1100 °C, according to the XRD, SEM, IR and Raman spectroscopy data, resulted in the formation of impurity phases. However, their extremely small amounts suggest that they may not form at the operating temperatures. Thus, it can be assumed that the studied materials can be good candidates for various electrochemical applications.
Ural Federal University
2024-01-10 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7210
Chimica Techno Acta; Том 10, № 4 (2023)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/7210/17473
(c) 2023 Liana Tarutina, Inna Starostina, Gennady Vdovin, Svetlana Pershina, Emma Vovkotrub, Anna Murashkina
oai:journals.urfu.ru:article/6961
2023-11-24T12:17:56Z
chimtech:L
nmb a2200000Iu 4500
"230824 2023 eng "
2411-1414
dc
Synthesis and properties of polymer electrolytes based on polyurethane elastomer and lithium salts
Fedorov, Nikita
Institute of Solid State Chemistry and Mechanochemistry SB RAS https://orcid.org/0009-0000-9192-2075
Ulihin, Artem
Institute of Solid State Chemistry and Mechanochemistry SB RAS https://orcid.org/0000-0002-6795-0006
Uvarov, Nikolai
Institute of Solid State Chemistry and Mechanochemistry SB RAS https://orcid.org/0000-0002-8209-7533
polymer solid electrolytes; polyurethane elastomer; swelling effect; ionic conductivity; effect of the salt concentration on swelling and conductivity.
Polymer solid electrolytes were obtained by swelling the polyurethane elastomer with solutions of lithium salts LiBF4 and LiClO4 in DMSO at different concentration of lithium salt. The swelling effect was found to decrease with the increase in the salt concentration, whereas, the ionic conductivity has a maximum of 6–8·10–4 S/cm at 5 wt.% lithium salt. The salt solutions incorporated into the polymer pores have melting points ranging from –10 to 2 °C and de-swelling takes place at low temperatures. The obtained polyurethane elastomer materials have a high conductivity and may be promising for use in flexible lithium polymer batteries.
Ural Federal University
2023-07-24 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6961
Chimica Techno Acta; Том 10, № 3 (2023)
eng
(c) 2023 Nikita Fedorov, Artem Ulihin, Nikolai Uvarov
oai:journals.urfu.ru:article/1693
2022-12-15T15:11:00Z
chimtech:A
nmb a2200000Iu 4500
"151225 2015 eng "
2411-1414
dc
Supervalent doping of LiFePO<sub>4</sub> for enhanced electrochemical performance
Kosova, N. V.
Institute of Solid state chemistry and
Mechanochemistry SB RAS, Novosibirsk
Podgornova, O. A.
Institute of Solid state chemistry and
Mechanochemistry SB RAS, Novosibirsk
LiFePO4; supervalence doping; mechanochemical activation; electrochemical cycling
Ортофосфаты LiFe0.9M0.1PO4 со структурой оливина, допированные ванадием и титаном, были получены с помощью механохимически стимулированного твердофазного синтеза с использованием высокоэнергетической планетарной мельницы АГО-2 и последующего отжига при 750 °C. Показано, что ионы V и Ti не полностью замещают ионы Fe2+ в структуре LiFePO4. Оставшаяся часть этих ионов участвует в образовании второй фазы с насиконоподобной структурой: моноклинной Li3V2(PO4)3 (пространственная группа P21/n) и ромбоэдрической LiTi2(PO4)3 (пространственная группа R-3c). Согласно ПЭМ, средний размер частиц нанокомпозитов около 100-300 нм. ЭДС микроанализ показал, что мелкие частицы вторичных фаз сегрегированы на поверхности более крупных частиц LiFePO4. На зарядно-разрядных кривых LiFe0.9M0.1PO4 присутствуют плато, соответствующие LiFePO4 и второй фазе. Допирование ванадием повышает устойчивость циклирования LiFePO4 и улучшает его циклируемость при высоких скоростях в большей степени, чем в случае допирования титаном.
Ural Federal University
2015-12-25 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1693
Chimica Techno Acta; Том 2, № 4 (2015)
rus
(c) 2015 N. V. Kosova, O. A. Podgornova
oai:journals.urfu.ru:article/1121
2022-12-15T15:10:51Z
chimtech:A
nmb a2200000Iu 4500
"150527 2015 eng "
2411-1414
dc
About the stabilization of the dendritic structure of GG brand copper powder
Reznikova, O. G.
Ural federal university, Ekaterinburg
Darintseva, A. B.
Ural federal university, Ekaterinburg
Murashova, I. B.
Ural federal university, Ekaterinburg
electrolytic metal powders; powder metallurgy; copper powder
В промышленности порошок меди получают при поддержании постоянной токовой нагрузки. По мере развития дендритного осадка происходит огрубление поверхности. Для получения более равномерного по структуре осадка предложено через определенные промежутки времени задавать новый импульс тока, равный исходной плотности тока 3200 А/м2. Токовую нагрузку определяли по результатам хронопотенциометрических исследований динамики развития дендритного осадка на цилиндрическом электроде. Проведено исследование четырехимпульсного гальваностатического электролиза для порошка меди марки GG. Новый импульс тока сдвигает потенциал электрода в более отрицательную область, процесс кристаллизации металла начинает протекать более интенсивно.
Ural Federal University
2015-05-27 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1121
Chimica Techno Acta; Том 2, № 2 (2015)
rus
(c) 2015 O. G. Reznikova, A. B. Darintseva, I. B. Murashova
oai:journals.urfu.ru:article/4444
2022-12-15T15:15:59Z
chimtech:A
nmb a2200000Iu 4500
"200520 2020 eng "
2411-1414
dc
Synthesis, structure and electrical properties of Li<sup>+</sup>-doped pyrochlore Gd<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>
Anokhina, Irina A.
Ural Federal University, Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Animitsa, Irina E.
Ural Federal University, Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Buzina, Anastasia F.
Ural Federal University, Yekaterinburg
Voronin, Vladimir I.
Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Vykhodets, Vladimir B.
Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Kurennykh, Tatyana E.
Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
Zaikov, Yuri P.
Ural Federal University, Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg
gadolinium zirconate Gd2Zr2O7, pyrochlore, Li+-doping, conductivity
The pyrochlore Gd1.55Li0.45Zr2O6.55 was prepared by the solution and solid-state methods. The introduction of lithium in the Gd-sublattice led to decrease in the lattice parameter a = 10.4830(8) Å in comparison with Gd2Zr2O7 (a =10.5346(2) Å). Monitoring of the lithium content in the sample during heat treatments showed a loss of lithium at temperatures above 1100 °C, so, to maintain the stoichiometry of lithium the low temperature sintering methods are required. The sample Gd1.55Li0.45Zr2O6.55 exhibited a predominant oxygen-ion transport over a wide range of temperatures. Although doping did not lead to an increase in the oxygen-ion conductivity compared to Gd2Zr2O7, it caused the suppression of the hole conductivity.
Ural Federal University
2020-06-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4444
Chimica Techno Acta; Том 7, № 2 (2020)
eng
(c) 2020 Irina A. Anokhina, Irina E. Animitsa, Anastasia F. Buzina, Vladimir I. Voronin, Vladimir B. Vykhodets, Tatyana E. Kurennykh, Yuri P. Zaikov
oai:journals.urfu.ru:article/722
2022-12-15T15:05:22Z
chimtech:A
nmb a2200000Iu 4500
"141231 2014 eng "
2411-1414
dc
Interaction of ZG-refractory with mold flux and ambient air
Jagovcev, A. V.
Ural federal university, Ekaterinburg
Obabkov, N. V.
Ural federal university, Ekaterinburg
zirconia graphite refractory material; refractory; slag; silicon carbide; boron carbide; antioxidant properties
Цирконистографитовый материал применяется при непрерывной разливке стали. От устойчивости к шлаку зависит продолжительность разливки. Был использован дробный факторный эксперимент 25-1 для определения влияния состава огнеупора (содержание графита, карбида кремния, карбида бора) на окисляемость и взаимодействие с шлакообразующей смесью (C/S=1, F=8 %) при 1400 °С. Установлено, что карбид бора обладает лучшими антиокислительными свойствами по сравнению с карбидом кремния. Добавка карбида бора в количестве 3%(масс) снижает устойчивость цирконистографитового огнеупора к шлаку. Значения толщины обезуглероженного слоя находятся в пределах 1–7 мм. Добавки карбида бора и карбида кремния снижают толщину окисленного слоя. Экспериментально установлено, что карбид бора обладает лучшими антиокислительными свойствами, чем карбид кремния, поэтому в изучаемых цирконистографитовых материалах действие SiC менее эффективно, чем B4C.
Ural Federal University
2014-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/722
Chimica Techno Acta; Том 1, № 3 (2014)
rus
(c) 2014 A. V. Jagovcev, N. V. Obabkov
oai:journals.urfu.ru:article/7398
2024-03-27T12:59:29Z
chimtech:L
nmb a2200000Iu 4500
"240202 2024 eng "
2411-1414
dc
Synthesis and electrical properties of doped layered perovskites based on BaMInO<sub>4</sub> (M = Y, Gd)
Tarasova, Nataliia
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University https://orcid.org/0000-0001-7800-0172
Mashkovtsev, Maxim
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University https://orcid.org/0000-0002-4914-262X
Domashenkov, Maxim
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University
Khionin, Denis
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University
Bastrikov, Roman
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University
Bedarkova, Anzhelika
Institute of High Temperature Electrochemistry, UB RAS; Ural Federal University https://orcid.org/0000-0003-4346-5644
layered perovskite; oxygen-ion conductivity; Ruddlesden-Popper; structure
Perovskite or perovskite-related structural materials are widely studied for their many functional properties. They can be used as components of electrochemical devices such as solid oxide fuel cells and electrolyzers. Layered perovskites can also be considered as promising materials for use in these devices. In this paper, the possibility of heterovalent (acceptor and donor) and isovalent doping of La and In sublattices of layered perovskites BaYLaInO4 and BaGdLaInO4 was made for the first time. The structure and electrical properties of these oxides were studied. Electrical conductivity values increase in the series BaYInO4–BaLaInO4–BaGdInO4. However, the doping is an unsuitable strategy for improving the electrical properties of BaYInO4 and BaGdInO4 oxides. Further search for highly conductive materials with the layered perovskite structure can be aimed at materials with a different composition of the cation sublattice.
Ural Federal University
2024-01-16 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/7398
Chimica Techno Acta; Том 11, № 1 (2024)
eng
(c) 2024 Nataliia Tarasova, Maxim Mashkovtsev, Maxim Domashenkov, Denis Khionin, Roman Bastrikov, Anzhelika Bedarkova
oai:journals.urfu.ru:article/1939
2022-12-15T15:10:03Z
chimtech:A
nmb a2200000Iu 4500
"160723 2016 eng "
2411-1414
dc
An Improved Process for the Preparation of the <i>p</i>-tert-butylcalix[4]arene: from Laboratory-scale Synthesis to Scale-up Development
Fat'yanova, A. A.
Ural federal university, Ekaterinburg
Gusak, A. S.
Ural federal university, Ekaterinburg
Trofimova, O. A.
Ural federal university, Ekaterinburg
Prokhorova, P. E.
Ural federal university, Ekaterinburg
calix[4]arene; formalin; diphenyl ether; p-tert-butylphenol; condensation; efficiency; scalability; synthesis
Рассмотрен синтез п-третбутилкаликс[4]арена с разными загрузками исходных веществ. Полученные данные выявили зависимость выхода от растворителя, времени и объема загрузки. Приведено описание технологического процесса и его материальные потоки.
Ural Federal University
2016-07-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1939
Chimica Techno Acta; Том 3, № 2 (2016)
rus
(c) 2016 A. A. Fatyanova, A. S. Gusak, P. E. Prokhorova, O. A. Trofimova
oai:journals.urfu.ru:article/1276
2022-12-15T15:10:56Z
chimtech:A
nmb a2200000Iu 4500
"151006 2015 eng "
2411-1414
dc
Simulation of an electrolytic bath for electrodeposition of multilayer shielding coatings
Dolmatova, E. A.
Ural federal university, Ekaterinburg
Dayanov, A. D.
Ural federal university, Ekaterinburg
Ostanina, T. N.
Ural federal university, Ekaterinburg
electrochemistry; simulation; copper acetate; nickel acetate; multilayer shielding coating
В работе проведен расчет гальванической ванны формирования многослойных экранирующих покрытий Cu/(Ni+Cu) из ацетатного электролита, содержащего 0,03 моль/л CuAc2, 0,3 моль/л NiAc2 и 1,66 моль/л уксусной кислоты. По результатам поляризационных исследований выбраны значения плотностей тока импульсного режима нанесения покрытий и определен выход по току меди и никеля в период осаждения сплава Cu-Ni. Для обеспечения постоянного состава электролита предложено использовать нерастворимые аноды из нержавеющей стали и непрерывную циркуляцию электролита. Разработана схема потоков, позволяющая проводить корректировку состава раствора с использованием дополнительной сборной емкости. Рассчитан состав корректирующего потока, непрерывно подаваемого в сборную емкость.
Ural Federal University
2015-10-06 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/1276
Chimica Techno Acta; Том 2, № 3 (2015)
rus
(c) 2015 E. A. Dolmatova, A. D. Dayanov, T. N. Ostanina
oai:journals.urfu.ru:article/5394
2021-12-28T02:27:04Z
chimtech:A
nmb a2200000Iu 4500
"211126 2021 eng "
2411-1414
dc
Kinetic instability of a chitosan – aspartic acid – water system as a method for obtaining nano- and microparticles
Lugovitskaya, T. N.
Ural Federal State University named after the first President of Russia B. N. Yeltsin https://orcid.org/0000-0002-8286-0711
Shipovskaya, A. B.
Saratov National Research State University named after N.G. Chernyshevsky
Shipenok, X. M.
Saratov National Research State University named after N.G. Chernyshevsky
chitosan; L-aspartic acid; counterionic; association; nanoparticles
The specific electrical conductivity and dielectric constant of aqueous solutions of ionic aminopolysaccharide chitosan in L-aspartic acid were investigated. An increase of the mobility of charge carriers in these solutions was found in comparison with solutions of an individual acid. The evaluation of the kinetic stability revealed that the viscosity, electrical conductivity and dielectric constant of the chitosan – L-aspartic acid – water system decrease, while the pH value increases. It was shown that the time variation of physicochemical and electrochemical parameters is due to the effects of counterionic association with the transition of macromolecules to the ionomeric state and is accompanied by phase segregation of the polymer phase in the form of nano- and microparticles. The conducted studies carried out have shown the fundamental possibility of controlling the metastable state of this system in order to obtain nano- and microparticles.
Ural Federal University
2021-12-31 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5394
Chimica Techno Acta; Том 8, № 4 (2021)
eng
(c) 2021 T. N. Lugovitskaya, A.B. Shipovskaya, X.M. Shipenok
oai:journals.urfu.ru:article/6103
2022-12-22T16:14:24Z
chimtech:L
nmb a2200000Iu 4500
"220913 2022 eng "
2411-1414
dc
Investigation of physical and chemical parameters of the raw hydrocarbon material base of Kaliningrad region for the concept development of an oil refinery
Shcherban, Pavel
I. Kant Baltic Federal University https://orcid.org/0000-0001-5106-7852
Masyutin, Yakov
I. Kant Baltic Federal University https://orcid.org/0000-0003-4347-3425
Vatagina, Anna
I. Kant Baltic Federal University
Belova, Margarita
I. Kant Baltic Federal University
Stolyarenko, Alexander
I. Kant Baltic Federal University
oil quality; fractional composition; refinery design; regional energy security; physical and chemical oil analysis
The article analyzes the factors that determine the necessity of oil refinery construction in the Kaliningrad region of the Russian Federation. The assessment of the existing and prospective raw material base is performed. The data for the development of the feasibility study for an oil refinery construction are formed and analyzed. Taking into account the outdated data on the parameters of hydrocarbon raw materials produced in the region, as well as significant changes in the raw material base due to the tendency to develop offshore, rather than continental, fields the physical and chemical parameters of the oil fields of the Kaliningrad region are investigated for the possibility of their further use in oil refining in order to obtain high-quality gasoline and diesel fuel. The laboratory studies of oil samples on viscosity, density, fractional composition, content of sulfur, chloride salts, mechanical impurities, water, and flash point determination are carried out on the basis of the Russian state standards. The different variants of the refinery layouts are analyzed, considering the available raw material base. Taking into account the initial data obtained, a preliminary pre-design study of the technological scheme and the refinery mass balance is carried out and presented in the article.
Ural Federal University
2022-12-23 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6103
Chimica Techno Acta; Том 9, № 4 (2022)
eng
(c) 2022 Pavel Shcherban, Yakov Masyutin, Anna Vatagina, Margarita Belova, Alexander Stolyarenko
oai:journals.urfu.ru:article/6537
2023-04-10T05:45:25Z
chimtech:A
nmb a2200000Iu 4500
"230220 2023 eng "
2411-1414
dc
Synthesis, computational study, solvatochromism and biological studies of thiazole-owing hydrazone derivatives
Yadav, C. Kiran
Davangere University
Nandeshwarappa, B.P.
Davangere University https://orcid.org/0000-0003-0559-7240
Mussuvir Pasha, K.M.
Vijayanagara Sri Krishnadevaraya University
biological activity; DFT; solvatochromic study; thiazole-hydrazone conjugates
In the present work, we have synthesized thiazole-hydrazone conjugates 5(a–h) and characterized them using various analytical techniques such as UV, IR, NMR, and mass spectrometry. Solvatochromic properties were evaluated in ten solvents with different polarity and quantum chemical parameters using a DFT study. The antibacterial activity results revealed that compounds 5c, 5d and 5g exhibited good efficacy and that the remaining compounds displayed significant activity. The synthesized compounds were screened for their cytotoxic activity against HepG2 and MCF-7 cell lines, and all the synthesized compounds exhibited significant potency towards the screened cancer cell lines. The anti-inflammatory efficacy of the synthesized thiazole derivatives was determined against MMP-2 and MMP-9, and some of the compounds showed significant activity. Furthermore, the in silico molecular docking was performed with the COX-2 receptor.
Ural Federal University
2023-03-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/6537
Chimica Techno Acta; Том 10, № 1 (2023)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/6537/15412
(c) 2023 C. Kiran Yadav, B.P. Nandeshwarappa, K.M. Mussuvir Pasha
oai:journals.urfu.ru:article/4802
2022-12-15T15:17:08Z
chimtech:L
nmb a2200000Iu 4500
"201214 2020 eng "
2411-1414
dc
Synthetic route optimization of Sumepirin antiepileptic drug candidate
Dzyurkevich, M. S.
Kazan (Volga region) Federal University, Kazan
Shtyrlin, N. V.
Kazan (Volga region) Federal University, Kazan
Shtyrlin, Y. G.
Kazan (Volga region) Federal University, Kazan
pyridoxine; synthetic route optimization; scale-up; purification; antiepileptic drug; technology
In this work we describe the transformation of synthetic route of the antiepileptic drug candidate Sumepirin starting from discovery stage. Initial method included six step process requiring two steps of purification using colon chromatography and has poor overall yield of target compound. The process developed is convenient, scalable, technological and meet the most of conditions of green chemistry. The overall yield was increased up to 62.5% in four steps without colon chromatography purification which allows to obtain the target compound with purity of 99.5+% which is especially important for the active ingredient.
Ural Federal University
2020-12-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/4802
Chimica Techno Acta; Том 7, № 4 (2020): MOSM2020 Special Issue
eng
(c) 2020 M. S. Dzyurkevich, N. V. Shtyrlin, Y. G. Shtyrlin
oai:journals.urfu.ru:article/3299
2022-12-15T15:21:17Z
chimtech:A
nmb a2200000Iu 4500
"180731 2018 eng "
2411-1414
dc
Oxygen content and defect structure of the perovskite La<sub>0.5</sub>Ba<sub>0.5</sub>CoO<sub>3–δ</sub>
Malyshkin, D. A.
Ural Federal University, Ekaterinburg http://orcid.org/0000-0002-8828-4882
Novikov, A. Yu.
Ural Federal University, Ekaterinburg
Tsvetkov, D. S.
Ural Federal University, Ekaterinburg
oxygen nonstoichiometry; perovskite; defect structure; coulometric titration
Perovskite-type complex oxide La0.5Ba0.5CoO3–δ, promising cathode material for solid oxide fuel cells and precursor for synthesis of double perovskite LaBaCo2O6–δ, was prepared as a single-phase material. Its oxygen content was measured by two independent techniques in the temperature range 1000–1100 °C and at oxygen partial pressures corresponding to the stability field of cubic phase. The defect chemistry of this material was studied using the measured δ=f(pO2,T) dependences. The defect structure model based on the localized nature of the electronic defects was proposed and successfully verified.
Ural Federal University
2018-07-30 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/3299
Chimica Techno Acta; Том 5, № 2 (2018)
eng
(c) 2018 D. A. Malyshkin, A. Yu. Novikov, D. S. Tsvetkov
oai:journals.urfu.ru:article/5988
2022-08-29T06:13:28Z
chimtech:A
nmb a2200000Iu 4500
"220726 2022 eng "
2411-1414
dc
Soft mechanochemical synthesis and thermal stability of hydroxyapatites with different types of substitution
Eremina, Natalya V.
Institute of Solid State Chemistry and Mechanochemistry, SB RAS https://orcid.org/0000-0002-2692-9745
Makarova, Svetlana V.
Institute of Solid State Chemistry and Mechanochemistry, SB RAS https://orcid.org/0000-0002-0770-5914
Isaev, Denis D.
Institute of Solid State Chemistry and Mechanochemistry, SB RAS https://orcid.org/0000-0003-2346-9584
Bulina, Natalya V.
Institute of Solid State Chemistry and Mechanochemistry, SB RAS https://orcid.org/0000-0003-4751-0705
mechanochemical synthesis; hydroxyapatite; substitution; iron; cupper; zinc; silicate; thermal stability
The feasibility of soft mechanochemical synthesis was studied here for hydroxyapatite with various types of substitution. It was shown that this method allows obtaining hydroxyapatites substituted with copper or iron cations and hydroxyapatites cosubstituted with zinc cations and silicate groups. Thermal stability of the synthesized samples was evaluated. It was found that to preserve phase homogeneity of the material, the temperature during the preparation of ceramic products and coatings should not exceed 600–800 °C. An exception is the hydroxyapatite where a hydroxyl group is expected to be replaced by a copper cation during the synthesis at a degree of substitution x = 0.5. For this sample, the temperature of the the heat treatment can be increased to 1100–1200 °C because copper cations return to the hydroxyapatite crystal lattice at these temperatures, and the material becomes single-phase.
Ural Federal University
2022-09-01 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5988
Chimica Techno Acta; Том 9, № 3 (2022)
eng
(c) 2022 Natalya V. Eremina, Svetlana V. Makarova, Denis D. Isaev, Natalya V. Bulina
oai:journals.urfu.ru:article/5055
2021-08-25T07:12:26Z
chimtech:A
nmb a2200000Iu 4500
"210511 2021 eng "
2411-1414
dc
Physical and Chemical Characterization of Drag Reducing Polymer Based on Polyvinylpyrrolidone (PVP) in Human Blood Flow
Jawad, Akram Jassim
University of Babylon, Al Hillah, Iraq; Queen Mary University of London, London, UK http://orcid.org/0000-0002-4860-6082
Braihi, Auda J.
University of Babylon, Al Hillah
Polyvinylpyrrolidone (PVP); Blood flow; Biorheology; Drag reducing polymers (DRPs); Cone on plate; Atomic force microscopy
A new attempt to use Polyvinylpyrrolidone (PVP) as a bio-drag reducing polymer agent for human blood flow has been studied. PVP was added at 0, 500, 750 and 1000 part per million (ppm) and mixed with human blood at room temperature for 2 minutes. Then, a cone on plate rheometer was used to investigate the effectiveness of PVP agent on blood rheological properties. The results showed significant effecting of PVP on blood fluidity characteristics, where the viscosity decreased as the PVP content increased or as a shear rate increased. For a certain shear rate, the shear stress decreased as PVP content increased. These changes will lead to increased mixing efficiency within the capillaries, increased oxygen transportation, increased tissue perfusion, modified red blood cells (RBCs) distribution, reduced pressure drop gradients, enhanced turbulent flow tendency, enhanced viscoelasticity nature of the blood and its strengthened non-Newtonian pattern. Also, the results showed that the viscosity-shear stress relationships become more linear at higher PVP concentrations. PVP addition caused no shifting in UV-absorbing positions and only moderate intensity changing. Atomic force microscopy (AFM) parameters provide other indicators about the role of PVP as a drag reduction agent for blood flow, where all of the amplitude, hybrid and special parameters decreased significantly.
Ural Federal University
2021-07-04 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5055
Chimica Techno Acta; Том 8, № 2 (2021)
eng
(c) 2021 Akram Jawad, Auda Braihi
oai:journals.urfu.ru:article/2665
2022-12-15T15:57:52Z
chimtech:A
nmb a2200000Iu 4500
"171024 2017 eng "
2411-1414
dc
Solubility and phase equilibria in the Na, Са || СО<sub>3</sub>, НСО<sub>3</sub>–H<sub>2</sub>O system at 0 °С
Soliev, L.
Tajik State Pedagogical University named after S. Ayni, Dushanbe
Dzhumaev, M. T.
Tajik State Pedagogical University named after S. Ayni, Dushanbe
Dzhabborov, B. B.
Tajik State Pedagogical University named after S. Ayni, Dushanbe
solubility; phase equilibria; liquid phase; chemical analysis; crystallo-optical analysis; phase diagram
The information on phase equilibria in the Na, Ca || CO3, HCO3-H2O system at 0 °С, predicted earlier by the translation method, has been obtained experimentally. Dependences of the concentration parameters reflecting phase equilibria are presented in the form of geometric patterns on the solubility diagram for the system studied. The diagram of solubility of the investigated system at 0 °С is constructed for the first time, in which the contours of the crystallization fields of individual phases are outlined, the conditions for their сo-crystallization in the form of curves and points are determined.
Ural Federal University
2017-10-20 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/2665
Chimica Techno Acta; Том 4, № 3 (2017)
eng
(c) 2017 L. Soliev, M. T. Dzhumaev, B. B. Dzhabborov
oai:journals.urfu.ru:article/5495
2022-03-20T11:41:02Z
chimtech:A
nmb a2200000Iu 4500
"220121 2022 eng "
2411-1414
dc
Novel synthesis of 3-(Phenyl) (ethylamino) methyl)-4-hydroxy-2H-chromen-2-one derivatives using biogenic ZnO nanoparticles and their applications
Anjan Kumar, G. C.
Kuvempu University, Shankaraghatta, Karnataka
Bodke, Yadav D.
Kuvempu University, Shankaraghatta, Karnataka
Manjunatha, B.
Kuvempu University, Shankaraghatta, Karnataka
Satyanarayan, N. D.
Kuvempu University, Shankaraghatta, Karnataka
Nippu, B. N.
Kuvempu University, Shankaraghatta, Karnataka
Joy, Muthipeedika Nibin
Ural Federal University
MCRs; Biogenic ZnO; benzylamino coumarins; antioxidant; corrosion inhibition
The present work describes the novel synthesis of 3, 3'-((phenyl) (ethylamino) methyl)-4-hydroxy-2H-chromen-2-one derivatives catalyzed by biogenic ZnO nanoparticles. The synthesized heterocyclic compounds were characterized by fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) andmass spectrometric techniques. Absorption, distribution, metabolism and excretion properties and various toxicities (ADMET) studies and in silico molecular docking studies were carried out for the synthesized compounds. The synthesized compounds were screened for their efficacy towards the antioxidant activity and were subjected to corrosion inhibition study towards the mild steel in acidic medium by weight loss method. Additionally, the recyclability of the employed catalyst was studied.
Ural Federal University
2022-03-17 00:00:00
application/pdf
https://journals.urfu.ru/index.php/chimtech/article/view/5495
Chimica Techno Acta; Том 9, № 1 (2022)
eng
https://journals.urfu.ru/index.php/chimtech/article/download/5495/12646
(c) 2021 G.C. Anjan Kumar, Yadav D. Bodke, B. Manjunatha, N.D. Satyanarayan, B.N. Nippu, Muthipeedika Nibin Joy
645fb0923bc4f45bec68115bdb466913